Bangalore University Results 2011 Nov - BCA 3rd sem Results

Bangalore Univ Results 2011
The bangalore University has declared results for BCA third Semester students,get all your results from the web url given here.

BU BCA Results 2011
The results page url is given below,and students can check their results by simply entering the "Registration Number" .

BU BCA Reuslts

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RRC Results for Mumbai Group D Eligible candidate Lists

RRC Mumbai CR, Results of Group ‘D’ 2007 Eligible Candidate List
Railway Recruitment Cell (RRC) Central Railway (CR) has released the eligible candidates list for the written test results.The Group D 2007 Eligible list can be downloaded online that we've attached.

If you've written RRC test ,then you can check your status fromthe link given here .



RRC CR Results eligible lists.

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Vinoba Bhave Univ Results 2011 BA ,BCom,BSc General and Vocational Results

Vinoba Bhave University Result Of B.A,B.Com,B.Sc General and Vocational Honours Part II Examination 2011
The results for the BA,BCom,BSc General and Vocational part 2 exams has been released online today 29th ,nov 2011.

Students can check their results status from the file we've attached here


Also if you want to see your results here,just a min.

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Telengana University Time Table for MBA and MCA 1st Internal Assesment Exam

Time Table for Telengana University MBA & MCA
Telengana University has released the notifications of time table for 1st semester internal assessment for those who are doing MBA and MCA .

The details of the Notifications can be obtained from the manabadi portal here.
The First Internal Assessment Examination is scheduled for 7th,8th and 9th of Dec 2011.


Telengana Univ Internal Seminar Exams:
The Internal Seminar Exam I is from 12th Dec to 13th Dec 2011.
Internal Seminar Exam II is from 30th Dec to 31st Dec 2011.

Have query? Kindly drop your comments for further assistants.Thank you!

Kerala Univ 2nd and 3rd Year MBA IDE, Supple Degree Exam Nov/Dec 2011

Kerala Univ 2nd 3rd year MBA IDE Exam Schedules 2011
The University of Kerala (UOK) has announced the schedules for IDE and MBA students who are pursuing 2nd and 3rd year.

Students can get the schedules right from the link given here.

Exam Schedule for IDE 2011

kerala university,exam dates,schedule

UOK Exam Schedule for MBA Nov/Dec 2011

kerala university,exam,dates,schedules



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AIEEE 2012 Dates Announced for CBSE Students - Check it Now

CBSE AIEEE Exam Dates 2012Central Board of Secondary Education (CBSE), today 29th nov,2011 announced the dates for All
India Engineering Entrance Examination 2012, also known as AIEEE. As per the announcement the AIEEE offline exam will be conducted on April 29, 2012 in 68 cities,
however, the online examination (i.e. CBT Mode) is scheduled from May 7-25,
2012 in 22 cities only across the country.

Changes in CBSE 2012:
CBSE has made few changes in the examination procedures for the year 2012.For
instance, Kota has been added as a new examination centre for online
examination. As per the sources, CBSE has taken the decision to add Kota due to
the high demand from the large student community of the city.
Fee for AIEEE 2012:In addition, the examinees appearing in online exam will be given concession of Rs 150 to Rs 300
in their examination fees.
The examination fee for AIEEE is to be accepted through Credit/Debit Cards or
Demand Drafts (DDs).

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Krishna University LLB and BA LLB 2nd Semester Revaluation Results 2011

Krishna University L.LB and BA.LL.B II Semester Revaluation Results 2011
Students,today 29th Nov,2011 revaluation results for Krishna University has been released for LLB and LLB of BA 2nd semester .You can simply get your results from the url given here .
Krisha University L.LB Results Here

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KLE University Notifications for PG Diploma Degree Courses Admissions 2012

KLE Admissions 2011
KLE has released the notifications for Entrance Exams for various stream of courses of PG,Diploma Courses .

You can get the informations regarding the KLE Univ nootifications here we've attached below,
Download the pdf here


The University shall be conducting KLE University Post-Graduate AllIndia Entrance-Test-
2012 (KLE-PGAIET-2012) on Saturday, the 28
th
January 2012 from 2:00 to 5:00 PM at
ninteen centers across the country viz. Belgaum, Bangalore, Pune, Ahmedabad, Delhi,
Hyderabad, Vijaywada, Kolkata, Panjim, Indore, Jaipur, Chandigarh, Coimbatore, Mumbai,
Nagpur, Chennai, Rajkot, Cochin and Guwahati for admission to various Post-Graduate
Degree/Diploma Courses(Medical/Dental) in the constituent colleges of the University viz. J.
N. Medical College, Belgaum and KLE V. K. Institute of Dental Sciences, Belgaum, for the
academic session 2012-13.

Printout of the application form along with DD for Rs. 3,000/- payable at Belgaum drawn on
any Nationalized Bank in favour of Registrar KLE University, Belgaum. has to be sent by post
orsubmitted in person to the Registrar's office, KLE University, Belgaum, So as to reach on or
before 21th January, 2012 by 5.00 pm.

APSCHE PGEC PGCET Final Counselling Notifications 2011

APSCHE Final Phase Notifications 2012
You may be still awaiting for the informations about PGEC / PGCET of APSCHE ,and the board has released the final phase notifications for the students,yes gothrough the page here and check your date for certificate verifications .

You can get known the counselling certificate verification shedules,here in studentsidea.

Download the pdf here


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Alagappa University Collaborative Exam Time Table Nov/Dec 2011

Alagappa University Exam Schedule 2011
The Notifications for Alagappa University Collaborative exams on this nov/dec 2011 has been declared ,and you can get the exam time table from the link given below.

Exam Time Table


Don't forgot to subscribe for Email Alerts to get all upcoming updates to your inbox,also share this to facebook,Twitter.

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LAWCET/PGLCET 2011 Final Phase Counselling Schedule - Notifications Check now for Web Councselling

LAWCET/PGLCET 2011 Final Phase Counselling
The notifications for LAWCET has been released ,and those who would like to apply for final phase can get the schedule as given below.

LAWCET 2011 final phase counselling informations are available on this link as well as go through the page below.


The qualified and eligible candidates of LAWCET/PGLCET-2011 Examinations are informed to attend certificate verification for Web counseling for admission into LLB-3years, LLB-5Years
and LLM courses on 28-11-2011 and 29-11-2011 at any one of
the Helpline Centers Notified in the First Phase.

All the registered candidates in both Phases can exercise web options during 28th & 29th November 2011.
ALL Special category Candidates Viz. PH/NCC/ CAP/SPORTS are informed to attend special category
certificate verification at Nizam College, Basheerbagh,
Hyderabad on 28th Nov,2011 with relevant certificates.

Original Certificates to be submitted at Helpline Centers, Tution fee particulars, vacancies and instructions to exercise Web options are available on the web site
 http://cetadm.apsche.ac.in

PECET 2011 Final Phase Counselling Schedule

APSCHE Final Phase Counselling 2011
Today APSCHE has announced the notifications for final phase counselling of  PECET 2011 ,you can get the complete informations of the PECET final phase schedule here ,given below,

Final Phase Web Counseling schedule
Event
  • Verification and submission of original Certificates and exercising options for Web based counseling at Help Line centers
    Course :B.P.Ed and UGDPED
     on
    Date:28 & 29 November 2011.
  • Issue of allotment letters (Candidates can download allotment letters): candidates can down load fromwebsite: http://pecet.apsche.ac.in Course: Both courses
    Date : 30.11.2011
  • Last date for admission into colleges and payment of tuition fee and special fee as per allotment order
    Course: Both courses
    Date:  5.12.2011
  • Last date for Return of Certificates for the remaining candidates from the respective helpline centers
    Course:Both courses
    Date: 6.12.2011
Download the PECET Guide here in this link



    FINAL PHASE
    Web counseling for admission into B.P.Ed and U.G.D.P.Ed courses for the academic year 2011-12 as per
    the schedule given below at any one of the
    Help Line centers
    i.e.
    1.Hyderabad: Nizam
    College, Basheerbagh,
    2.Warangal: Kakatiya University,
    3.Visakhapatnam: Andhra
    University,
    4. Guntur: Acharya Nagarjuna University,
    5. Ananthapur: Sri Krishna
    Devaraya University
    6.Tirupathi: Sri Venkateswara University.

    Limited number of candidates (1:5) are invited for the web based counseling
    taking into consideration the available vacancies in each region and category after
    admission of candidates in first phase counseling. Only the following candidates are
    invited for the web counseling.

    B.P.Ed., candidates invited for the web Counseling
    B.P.Ed., Ranks called up to (cut off rank)
    CAT
    AU OU SVU
    Gen Women Gen Women Gen Women
    ALL 1100 All 500 2000 400 1000
    SC 2150 All 850 4350 450 2600
    ST 1650 All 690 3200 600 All
    BC-A 3250 All 1100 All 450 2350
    BC-B 3400 All 960 4600 600 All
    BC-C All All All All All All
    BC-D 1130 All 800 3550 500 4000
    BC-E All All 3420 All 450 All
    NCC 4554,242,63,1042,
    309,750,1477,3362,4139,1703
    & 2567
    1538,2043,4697,
    99,
    2915,918,4743,1963
    & 3309
    3418
    CAP 215,242,618,2632, 3522,4139,4659, 2643, 2103,2117,2460 & 5234

     Documents Needed for PECET counselling:The fresh candidates attending the Second (final) phase should submit the following
    original documents at the time of web counseling at the help line centers.

    * PECET-2011 Rank card & Hall Ticket
    *Degree / Intermediate or its equivalent pass certificate & Memorandum of Marks
    * Memo of SSC or its equivalent
    * Study Certificate giving the details of past seven years of study
    * Residence certificate for Preceding 7 years of the qualifying examination i.e.,
    Graduation in respect of candidates who have private study without any
    institutionalized education
    * Integrated community certificate issued by the competent authority in case of
    BC/SC/ST candidates
    * Residence certificate of father or mother for a period of 10 years in A.P. excluding
    the period of their employment outside A.P. from M.R.O in case of Non local
    candidates
    * Transfer Certificate
    3
    * Candidates claiming fee exemption have to produce parental income certificate
    from all sources up to an annual income of Rs.1,00,000/- (Rs.2,00,000/- in case
    of SC/ST) duly signed by MRO after 01.01.2011.
    * One set of Xerox copies of all certificates.
    * In case of candidates seeking admission under SC, ST or BC Category, they have
    to submit an integrated community certificate prescribed by the Government and
    issued by the revenue authorities in the Government (Vide G.O.Ms.No.58, Social
    Welfare (J) Dept., Dt: 12-5-1997).
    *Candidates seeking the admission under NCC category should submit N.C.CCertificate issued by the appropriate authority.

    Principles Of Communication POC Important Questions fro Nov/Dec 2011 Anna Univ Exam

    POC Important Questions for Anna Univ Exam Nov/Dec 2011
    Get Important Questions for Principles of Communication 142304 ,anna university of Technology students will write POC exam on 25th Nov,2011.Here are some FAQ asked questions we've shaed with you.Make a note of this questions while preparing,but don't simply rely on this alone.Prepare well and Do Well!!

    If you like this posts ,then do share this with friends @facebook,@Twitter,it may be helpful for spreading this useful thing.

    142304 - PRINCIPLES OF COMMUNICATION


    UNIT I

    1. Write short notes on AM power distribution
    2. In angle modulation, explain frequency devation, percent modulation, phase deviation and modulation index with suitable example
    3. Compare FM and AM
    4. Explain AM voltage distribution and AM power distribution
    5. Derive the relationship between the voltage amplitudes of the side band frequencies and the carrier and draw the frequency spectrum
    6. Derive an expression for the Amplitude modulated signal and draw its frequency spectrum

    UNIT II
    1. What is known as Binary phase shift keying? Discuss in detail the BPSK transmitter and Receiver and also obtain the minimum double sided Nyquist bandwidth
    2. Explain the principle of FSK transmitter and receiver
    3. Explain QPSK transmitter and receiver. Give bandwidth, baud, and its relevant equations with neat constellation and output waveforms
    4. Illustrate the concept of 8 QAM transmitter with the truth table
    5. Compare the various types of digital modulation techniques.

    UNIT III

    1. Explain ISI for NRZ input signal. Discuss about the causes of ISI.
    2. What is called companding? Briefly discuss the Analog companding and digital companding
    3. Explain the elements of PCM system with a neat block diagram
    4. Describe the operations of DPCM system with relevant diagram
    5. Determine 12-bit linear code, 8-bit compressed code, the decoded 12- bit code, the c quantization error and compression error for a resolution of 0.01 voltage for analog sample voltages of a) 0.083V b) -0.398Vc) +9.234V d) -20.124 V


    UNIT IV


    1. Write short notes on Frequency hop spread spectrum.
    2. Discuss in detail about TDMA and CDMA
    3. Give a detailed account of multiple access techniques
    4. Discuss the frequency HOP spread spectrum with suitable diagram
    5. Explain CDMA System with its features. Explain the various problems available in CDMA system. Compare TDMA & FDMA

    UNIT V

    1. Describe a satellite communication system with a suitable block diagram
    2. Enumerate the elements of an optical fiber transmission link.
    3. Write in detail on LEO and GEO orbits
    4. Draw the neat diagram of satellite system link model. Explain its each part in detail.
    5. Briefly describe the function of Optical Detectors.

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    Important Questions for EDC - Electronics Device and Circuits 131303 - Anna Univ exam Nov/Dec 2011

    Anna Univ Important Questions for EDC
    Here is the important questions that you can keep in mind while preparing for your university exams.But bear in mind that it is solely taken from the frequently asked questions from anna univ.Don't simply rely on this questions alone.

    131303 - Electronic Devices and Circuits

    UNIT I

    1. Explain the working of a PN junction forward bias and in reverse bias
    2. Explain the operation of zener diode and define zener breakdown. Draw its VI characteristics.
    3. With a neat sketch, explain the operation of PN junction diode
    4. Define regulator. Explain the operation of any one type of regulator.
    5. With a neat sketch, explain the operation of CLC and LC filter


    UNIT II

    1. Draw and explain input and output characteristics of common emitter configuration of a transistor
    2. Explain in detail on voltage gain and current gain expressions for CB configuration using transistor hybrid model
    3. Draw the input and output characteristics of N-P-N transistor in common base configuration and explain it. How the different hybrid parameters are found out from the above characteristics
    4. Explain how the hybrid parameters hfe , hoe, hie, hre can be determined from the CE characteristics of a transistor .

    UNIT III
    1. Explain the principle of operation of N-channel JFET
    2. Give a detailed description of construction and operation of JFET
    3. Explain the working principle and characteristics of Depletion N-MOSFET under depletion mode and enhancement mode in detail
    4. Derive the expression for Av, Ri, and Ro for CS JFET amplifier


    UNIT IV
    1. Draw the circuit diagram of a phase shift oscillator using BJT. Derive the expression for its frequency of oscillation. Determine the minimum hfe for the transistor
    2. With suitable diagram explain the operation of Colpitts oscillator
    3. Explain the principle of operation of crystal oscillator and give its application
    4. Briefly discuss the effect of negative feedback on band width and stability of an amplifier

    UNIT V
    1. Explain the operation of Schmitt trigger using two transistor for a sinusoidal input
    2. Explain the operation of UJT and draw the VI characteristics.
    3. explain series and shunt clipper with suitable diagram
    4. Draw the circuit diagram of collector coupled astable multivibrator and explain its operation with relevant operation. Derive the expression for time period

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    Have Queries ? Do submit it via commetns.

    Prepare Well ! All The Best !!

    16 Marks for DIP - Digital Image Processing for Anna Univ EC2029 Sem Students

    Digital Image Processing 16 Marks for All Units

    IN previous posts ,we added Two Marks for All 5 Units,here in this post we have added 16 marks questions and answers type for Digital Image Processing (DIP).

    If you lik this posts/our works,It will be helpful if you share this to your frieds @facebook,@Twitter.

    You may need to look :
    * Two Marks Question and Answers :
    - Unit 1
    - Unit 2
    - Unit 3
    - Unit 4
    - Unit 5

    Have any queries ? ask it via comments.

    16 MARKS for Digital Image Processing EC2029

    UNIT I

    1. Explain the steps involved in digital image processing.
    (or)
    Explain various functional block of digital image processing
    # Image acquisition
    # Preprocessing
    # Segmentation
    # Representation and Description
    # Recognition and Interpretation

    2. Describe the elements of visual perception.
    # Cornea and Sclera
    # Choroid – Iris diaphragm and Ciliary body
    # Retina- Cones and Rods

    3. Describe image formation in the eye with brightness adaptation and
    discrimination
    # Brightness adaptation
    # Subjective brightness
    # Weber ratio
    #Mach band effect
    #simultaneous contrast

    4. Write short notes on sampling and quantization.
    # Sampling
    # Quantization
    # Representing Digital Images

    5. Describe the functions of elements of digital image processing system
    with a diagram.
    # Acquisition
    # Storage
    # Processing
    # Communication
    # Display

    6. Explain the basic relationships between pixels?
    # Neighbors of a pixel
    # Connectivity, Adjacency, Path

    # Distance Measure
    # Arithmetic and Logic Operations

    7. Explain the properties of 2D Fourier Transform.
    # Separability
    # Translation
    # Periodicity and Conjugate Symmetry
    # Rotation
    # Distribution and Scaling
    # Average Value
    # Laplacian
    # Convolution and correlation
    # Sampling

    8. ( i )Explain convolution property in 2D fourier transform.
    * 1D Continuous
    * 1D Discrete
    * 1D convolution theorem
    * 2D continuous
    * 2D Discrete
    * 2D convolution theorem
    (ii) Find F (u) and |F (u)|

    9. Explain Fast Fourier Transform (FFT) in detail.
    # FFT Algorithm
    # FFT Implementation

    10. Explain in detail the different separable transforms
    # Forward 1D DFT & 2D DFT
    # Inverse 1D DFT & 2D DFT
    # Properties

    11. Explain Hadamard transformation in detail.
    # 1D DHT
    # 1D Inverse DHT
    # 2D DHT
    # 2D Inverse DHT

    12. Discuss the properties and applications of
    1)Hadamard transform 2)Hotelling transform
    # Properties of hadamard:
    Real and orthogonal
    fast transform
    faster than sine transform
    Good energy compaction for image
    # Appl:
    Image data compression,
    filtering and design of course
    # Properties of hotelling:
    Real and orthogonal
    Not a fast transform
    Best energy compaction for image
    # Appl:
    Useful in performance evaluation & for finding performance
    Bounds

    13. Explain Haar transform in detail.
    # Def P= 2P+q-1
    # Find h k (z)

    14. Explain K-L transform in detail.
    Consider a set of n or multi-dimensional discrete signal represented as column
    vector x1,x2,…xn each having M elements,
    X1
    X2
    X= .
    .
    Xn
    The mean vector is defined as Mx=E{x}
    Where E{x} is the expected value of x. M
    For M vector samples mean vector is Mx=1/M _ Xk
    K=1
    T
    The co-variant matrix is, Cx=E{(X-Mx)(X-Mx)}
    M T
    For M samples, Cx=1/M _ (xk-Mx)(xk-Mx).
    K=1
    K-L Transform Y= A (X- MX)

    UNIT II

    1. Explain the types of gray level transformation used for image enhancement.
    # Linear (Negative and Identity)
    # Logarithmic( Log and Inverse Log)
    # Power_law (nth root and nth power)
    # Piecewise_linear (Constrast Stretching, Gray level Slicing,
    Bit plane Slicing)

    2. What is histogram? Explain histogram equalization.
    # P(rk) = nk/n
    # Ps(s) = 1 means histogram is arranged uniformly.

    3. Discuss the image smoothing filter with its model in the spatial domain.
    # LPF-blurring
    # Median filter – noise reduction & for sharpening image

    4. What are image sharpening filters. Explain the various types of it.
    # used for highlighting fine details
    # HPF-output gets sharpen and background becomes darker
    # High boost- output gets sharpen but background remains unchanged
    # Derivative- First and Second order derivatives
    Appl:
    # Medical image
    # electronic printing
    # industrial inspection

    5. Explain spatial filtering in image enhancement.
    # Basics
    # Smoothing filters
    # Sharpening filters

    6. Explain image enhancement in the frequency domain.
    # Smoothing filters
    # Sharpening filters
    # Homomorphic filtering

    7. Explain Homomorphic filtering in detail.
    # f(x, y) = i(x, y) . r(x, y)
    # Calculate the enhanced image g(x,y)

    UNIT III

    1. Explain the algebra approach in image restoration.
    # Unconstrained
    # Constrained

    2. What is the use of wiener filter in image restoration. Explain.
    # Calculate f^
    # Calculate F^(u, v)

    3. What is meant by Inverse filtering? Explain.
    # Recovering i/p from its o/p
    # Calculate f^(x, y)

    4. Explain singular value decomposition and specify its properties.
    # U= m=1_r___m _m
    T
    This equation is called as singular value decomposition of an image.
    # Properties
    The SVD transform varies drastically from image to image.
    The SVD transform gives best energy packing efficiency for any given

    image.
    The SVD transform is useful in the design of filters finding least
    square,minimum solution of linear equation and finding rank of large
    matrices.

    5. Explain image degradation model /restoration process in detail.
    # Image degradation model /restoration process diagram
    # Degradation model for Continuous function
    # Degradation model for Discrete function – 1_D and 2_D
    6. What are the two approaches for blind image restoration? Explain in detail.
    _ Direct measurement
    _ Indirect estimation

    UNIT IV

    1. What is data redundancy? Explain three basic data redundancy?
    Definition of data redundancy
    The 3 basic data redundancy are
    _ Coding redundancy
    _ Interpixel redundancy
    _ Psycho visual redundancy

    2. What is image compression? Explain any four variable length coding
    compression schemes.
    Definition of image compression
    Variable Length Coding
    * Huffman coding
    * B2 Code
    * Huffman shift
    * Huffman Truncated
    * Binary Shift
    *Arithmetic coding

    3. Explain about Image compression model?
    The source Encoder and Decoder
    The channel Encoder and Decoder

    4. Explain about Error free Compression?
    a. Variable Length coding
    i. Huffman coding
    ii. Arithmetic coding
    b. LZW coding
    c. Bit Plane coding
    d. Lossless Predictive coding

    5. Explain about Lossy compression?
    Lossy predictive coding
    Transform coding
    Wavelet coding

    6. Explain the schematics of image compression standard JPEG.
    Lossy baseline coding system
    Extended coding system
    Lossless Independent coding system

    7. Explain how compression is achieved in transform coding and explain about DCT
    _ Block diagram of encoder
    _ decoder
    _ Bit allocation
    _ 1D transform coding
    _ 2D transform coding, application
    _ 1D,2D DCT

    8. Explain arithmetic coding
    _ Non-block code
    _ One example

    9. Explain about Image compression standards?
    _ Binary Image compression standards
    _ Continuous tone still Image compression standards
    _ Video compression standards

    10. Discuss about MPEG standard and compare with JPEG
    _ Motion Picture Experts Group
    1. MPEG-1
    2. MPEG-2
    3. MPEG-4
    _ Block diagram
    _ I-frame
    _ p-frame
    _ B-frame

    UNIT V

    1. What is image segmentation. Explain in detail.
    Definition - image segmentation
    Discontinity – Point, Line, Edge
    Similarity – Thresholding, Region Growing, Splitting and
    Merging

    2. Explain Edge Detection in details?
    * Basic formation.
    * Gradient Operators
    * Laplacian Operators

    3. Define Thresholding and explain the various methods of thresholding in detail?
    Foundation
    The role of illumination
    Basic adaptive thresholding
    Basic adaptive thresholding
    Optimal global & adaptive thresholding.

    4. Discuss about region based image segmentation techniques. Compare
    threshold region based techniques.
    * Region Growing
    * Region splitting and merging
    * Comparison

    5. Define and explain the various representation approaches?
    chain codes
    Polygon approximations
    Signature
    Boundary segments
    Skeletons.

    6. Explain Boundary descriptors.
    Simple descriptors.
    Fourier descriptors.

    7. Explain regional descriptors
    Simple descriptors
    Texture
    i. Statistical approach
    ii. Structural approach
    iii. Spectral approach

    8. Explain the two techniques of region representation.
    _ Chain codes
    _ Polygonol approximation

    9. Explain the segmentation techniques that are based on finding the regions
    directly.
    _ Edge detection line detection
    _ Region growing
    _ Region splitting
    _ region merging

    10. How is line detected? Explain through the operators
    _ Types of line masks
    1. horizontal
    2. vertical
    3. +45°,-45°

    Unit 5 Digital Image Processing - Ec2029 Two Mark Question and Answers for Anna Univ Sem

    DIP Two Mark Question and Answers for Unit 5
    We've been updating all the units two mark questions and answers for Digital Image Procesing.IF you like our works then don't forgot to share this to your friends @facebook,@twitter,and hit 'Like us' ,as a thanks for this blog.

    We've spent hours for providing informations for you,it will be thankful if you share this posts to all social sharing sites.

    You may need to look :
    * Unit 1 Two Marks and Questions
    * Unit 2 Two Marks and Questions
    * Unit 3 Two Marks and Questions
    * Unit 4 Two Marks and Questions


     *16 Marks for all 5 Units

    UNIT V


    1. What is segmentation?
    Segmentation subdivides on image in to its constitute regions or objects. The level
    to which the subdivides is carried depends on the problem being solved .That is
    segmentation should when the objects of interest in application have been isolated.

    2. Write the applications of segmentation.
    * Detection of isolated points.
    * Detection of lines and edges in an image.

    3. What are the three types of discontinuity in digital image?
    Points, lines and edges.
    4. How the derivatives are obtained in edge detection during formulation?
    The first derivative at any point in an image is obtained by using the magnitude of
    the gradient at that point. Similarly the second derivatives are obtained by using the laplacian.

    5. Write about linking edge points.
    The approach for linking edge points is to analyze the characteristics of pixels in a
    small neighborhood (3x3 or 5x5) about every point (x,y)in an image that has undergone edge detection. All points that are similar are linked, forming a boundary of pixels that share some common properties.

    6. What are the two properties used for establishing similarity of edge pixels?
    (1) The strength of the response of the gradient operator used to produce the edge
    pixel.
    (2) The direction of the gradient.

    7. What is edge?
    An edge isa set of connected pixels that lie on the boundary between two regions
    edges are more closely modeled as having a ramplike profile. The slope of the ramp is inversely proportional to the degree of blurring in the edge.

    8. Give the properties of the second derivative around an edge?
    * The sign of the second derivative can be used to determine whether an edge
    pixel lies on the dark or light side of an edge.
    * It produces two values for every edge in an image.
    * An imaginary straightline joining the extreme positive and negative values of
    the second derivative would cross zero near the midpoint of the edge.

    9. Define Gradient Operator?
    First order derivatives of a digital image are based on various approximation of
    the 2-D gradient. The gradient of an image f(x,y) at location(x,y) is defined as the
    vector
    Magnitude of the vector is
    _f=mag( _f )=[Gx2+ Gy2]1/2
    _(x,y)=tan-1(Gy/Gx)
    _(x,y) is the direction angle of vector _f
    10. What is meant by object point and background point?
    To execute the objects from the background is to select a threshold T that separate these modes. Then any point (x,y) for which f(x,y)>T is called an object point. Otherwise the point is called background point.

    11. What is global, Local and dynamic or adaptive threshold?
    When Threshold T depends only on f(x,y) then the threshold is called global . If T
    depends both on f(x,y) and p(x,y) is called local. If T depends on the spatial coordinates x and y the threshold is called dynamic or adaptive where f(x,y) is the original image.

    12. Define region growing?
    Region growing is a procedure that groups pixels or subregions in to layer regions based on predefined criteria. The basic approach is to start with a set of seed points and from there grow regions by appending to each seed these neighbouring pixels that have properties similar to the seed.

    13. Specify the steps involved in splitting and merging?
    Split into 4 disjoint quadrants any region Ri for which P(Ri)=FALSE.
    Merge any adjacent regions Rj and Rk for which P(RjURk)=TRUE.
    Stop when no further merging or splitting is positive.

    14. What is meant by markers?
    An approach used to control over segmentation is based on markers.
    marker is a connected component belonging to an image. We have internal markers, associated with objects of interest and external markers associated with background.

    15. What are the 2 principles steps involved in marker selection?
    The two steps are
    1. Preprocessing
    2. Definition of a set of criteria that markers must satisfy.
    ]

    16. Define chain codes?
    Chain codes are used to represent a boundary by a connected sequence of
    straight line segment of specified length and direction. Typically this representation is based on 4 or 8 connectivity of the segments . The direction of each segment is coded by using a numbering scheme.


    17. What are the demerits of chain code?
    * The resulting chain code tends to be quite long.
    * Any small disturbance along the boundary due to noise cause changes in the code
    that may not be related to the shape of the boundary.

    18. What is thinning or skeletonizing algorithm?
    An important approach to represent the structural shape of a plane region is to
    reduce it to a graph. This reduction may be accomplished by obtaining the
    skeletonizing algorithm. It play a central role in a broad range of problems in image
    processing, ranging from automated inspection of printed circuit boards to counting
    of asbestos fibres in air filter.

    19. Specify the various image representation approaches
    Chain codes
    Polygonal approximation
    Boundary segments

    20. What is polygonal approximation method ?
    Polygonal approximation is a image representation approach in which a digital
    boundary can be approximated with arbitary accuracy by a polygon.For a closed curve the approximation is exact when the number of segments in polygon is equal to the number of points in the boundary so that each pair of adjacent points defines a segment in the polygon.

    21. Specify the various polygonal approximation methods
    Minimum perimeter polygons
    Merging techniques
    Splitting techniques

    22. Name few boundary descriptors
    Simple descriptors
    Shape numbers
    Fourier descriptors

    23. Give the formula for diameter of boundary
    The diameter of a boundary B is defined as
    Diam(B)=max[D(pi,pj)]
    i,j
    D-distance measure
    pi,pj-points on the boundary

    24. Define length of a boundary.
    The length of a boundary is the number of pixels along a boundary.Eg.for a chain
    coded curve with unit spacing in both directions the number of vertical and horizontal components plus _2 times the number of diagonal components gives its exact length.

    25. Define eccentricity and curvature of boundary
    Eccentricity of boundary is the ratio of the major axis to minor axis.

    Curvature is the rate of change of slope.

    26. Define shape numbers
    Shape number is defined as the first difference of smallest magnitude. The order n of a shape number is the number of digits in its representation.

    27. Describe Fourier descriptors
    Fourier descriptor of a boundary can be defined as
    K-1
    a(u)=1/K_s(k)e-j2_uk/K
    k=0
    for u=0,1,2……K-1.The complex coefficients a(u) are called Fourier descriptor
    of a boundary.
    The inverse Fourier descriptor is
    K-1
    s(k)= _ a(u)ej2_uk/K
    u=0
    for k=0,1,2,……K-1

    28. Give the Fourier descriptors for the following transformations
    (1)Identity (2)Rotation (3)Translation (4)Scaling (5)Starting point
    (1)Identity – a(u)
    (2)Rotation -ar(u)= a(u)ej_
    (3) Translation-at(u)=a(u)+_xy_(u)
    (4)Scaling-as(u)=_a(u)
    (5)Starting point-ap(u)=a(u)e-j2_uk
    0
    /K

    29. Specify the types of regional descriptors
    Simple descriptors
    Texture

    30. Name few measures used as simple descriptors in region descriptors
    Area
    Perimeter
    Compactness
    Mean and median of gray levels
    Minimum and maximum of gray levels
    Number of pixels with values above and below mean


    31. Define compactness
    Compactness of a region is defined as (perimeter)^2/area.It is a
    dimensionless quantity and is insensitive to uniform scale changes.

    32. Describe texture
    Texture is one of the regional descriptors. It provides measures of
    properties such as smoothness, coarseness and regularity. There are 3 approaches used to
    describe texture of a region.
    They are:
    Statistical
    Structural
    Spectral

    33. Describe statistical approach
    Statistical approaches describe smooth,coarse,grainy characteristics of
    texture.This is the simplest one compared to others.It describes texture using statistical moments of the gray-level histogram of an image or region.

    34. Define gray-level co-occurrence matrix.
    A matrix C is formed by dividing every element of A by n(A is a k x k
    matrix and n is the total number of point pairs in the image satisfying P(position
    operator). The matrix C is called gray-level co-occurrence matrix if C depends on P,the presence of given texture patterns may be detected by choosing an appropriate position operator.

    35. Explain structural and spectral approach
    Structural approach deals with the arrangement of image primitives such as
    description of texture based on regularly spaced parallel lines.
    Spectral approach is based on properties of the Fourier spectrum and are primarily
    to detect global periodicity in an image by identifying high energy, narrow peaks in
    spectrum.There are 3 features of Fourier spectrum that are useful for texture description.
    They are:
    Prominent peaks in spectrum gives the principal direction of texture patterns.
    The location of peaks in frequency plane gives fundamental spatial period of
    patterns.
    Eliminating any periodic components by our filtering leaves non- periodic
    image elements.

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    Unit 4 Digital Image Processing - Image Segmentation Two Marks Question and Answers for Anna Univ EC2029

    Unit 4 DIP Questions and Answers
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    UNIT IV IMAGE SEGMENTATION

    1. What is image compression?
    Image compression refers to the process of redundancy amount of data required to
    represent the given quantity of information for digital image. The basis of reduction
    process is removal of redundant data.

    2. What is Data Compression?
    Data compression requires the identification and extraction of source redundancy.
    In other words, data compression seeks to reduce the number of bits used to store or transmit information.

    3. What are two main types of Data compression?
    Lossless compression can recover the exact original data after compression. It is
    used mainly for compressing database records, spreadsheets or word processing
    files, where exact replication of the original is essential.
    Lossy compression will result in a certain loss of accuracy in exchange for a
    substantial increase in compression. Lossy compression is more effective when
    used to compress graphic images and digitised voice where losses outside visual
    or aural perception can be tolerated.

    4. What is the need for Compression?
    In terms of storage, the capacity of a storage device can be effectively increased with methods that compress a body of data on its way to a storage device and decompresses it when it is retrieved.
    In terms of communications, the bandwidth of a digital communication link can be
    effectively increased by compressing data at the sending end and decompressing data at the receiving end.
    At any given time, the ability of the Internet to transfer data is fixed. Thus, if data can effectively be compressed wherever possible, significant improvements of data
    throughput can be achieved. Many files can be combined into one compressed document making sending easier.

    5. What are different Compression Methods?

    Run Length Encoding (RLE)
    Arithmetic coding
    Huffman coding and
    Transform coding

    6. Define is coding redundancy?
    If the gray level of an image is coded in a way that uses more code words than
    necessary to represent each gray level, then the resulting image is said to contain coding redundancy.

    7. Define interpixel redundancy?
    The value of any given pixel can be predicted from the values of its neighbors.
    The information carried by is small. Therefore the visual contribution of a single pixel to an image is redundant. Otherwise called as spatial redundant geometric redundant or

    8. What is run length coding?
    Run-length Encoding, or RLE is a technique used to reduce the size of a repeating
    string of characters. This repeating string is called a run; typically RLE encodes a run of symbols into two bytes, a count and a symbol. RLE can compress any type of data regardless of its information content, but the content of data to be compressed affects the compression ratio. Compression is normally measured with the compression ratio:

    9. Define compression ratio.
    Compression Ratio = original size / compressed size: 1

    10. Define psycho visual redundancy?
    In normal visual processing certain information has less importance than other
    information. So this information is said to be psycho visual redundant.

    11. Define encoder
    Source encoder is responsible for removing the coding and interpixel redundancy
    and psycho visual redundancy.
    There are two components
    A) Source Encoder
    B) Channel Encoder

    12. Define source encoder
    Source encoder performs three operations
    1) Mapper -this transforms the input data into non-visual format. It reduces the
    interpixel redundancy.
    2) Quantizer - It reduces the psycho visual redundancy of the input images .This
    step is omitted if the system is error free.
    3) Symbol encoder- This reduces the coding redundancy .This is the final stage of
    encoding process.

    13. Define channel encoder
    The channel encoder reduces reduces the impact of the channel noise by inserting
    DEPARTMENT OF ECE, ADHIPARASAKTHI COLLEGE OF ENGINEERING, KALAVAI.
    EC2029 DIGITAL IMAGE PROCESSING
    redundant bits into the source encoded data.
    Eg: Hamming code

    14. What are the types of decoder?
    Source decoder- has two components
    a) Symbol decoder- This performs inverse operation of symbol encoder.
    b) Inverse mapping- This performs inverse operation of mapper.
    Channel decoder-this is omitted if the system is error free.

    15. What are the operations performed by error free compression?
    1) Devising an alternative representation of the image in which its interpixel
    redundant are reduced.
    2) Coding the representation to eliminate coding redundancy

    16. What is Variable Length Coding?
    Variable Length Coding is the simplest approach to error free compression. It
    reduces only the coding redundancy. It assigns the shortest possible codeword to the most probable gray levels.

    17. Define Huffman coding
    Huffman coding is a popular technique for removing coding redundancy.
    When coding the symbols of an information source the Huffman code
    yields the smallest possible number of code words, code symbols per
    source symbol.

    18. Define Block code
    Each source symbol is mapped into fixed sequence of code symbols or code
    words. So it is called as block code.

    19. Define instantaneous code
    A code word that is not a prefix of any other code word is called instantaneous or
    prefix codeword.

    20. Define uniquely decodable code
    A code word that is not a combination of any other codeword is said to be
    uniquely decodable code.

    21. Define B2 code
    Each code word is made up of continuation bit c and information bit which are
    binary numbers. This is called B2 code or B code. This is called B2 code because two information bits are used for continuation bits

    22. Define the procedure for Huffman shift
    List all the source symbols along with its probabilities in descending order.
    Divide the total number of symbols into block of equal size. Sum the probabilities of all the source symbols outside the reference block. Now apply the procedure for
    reference block, including the prefix source symbol. The code words for the remaining symbols can be constructed by means of one or more prefix code followed by the reference block as in the case of binary shift code.

    23. Define arithmetic coding
    In arithmetic coding one to one corresponds between source symbols and code
    word doesn’t exist where as the single arithmetic code word assigned for a sequence of source symbols. A code word defines an interval of number between 0 and 1.
    24. What is bit plane Decomposition?
    An effective technique for reducing an image’s interpixel redundancies is to
    process the image’s bit plane individually. This technique is based on the concept of
    decomposing multilevel images into a series of binary images and compressing each binary image via one of several well-known binary compression methods.
    25. What are three categories of constant area coding?
    The three categories of constant area coding are
    All white
    All black
    Mixed intensity.
    The most probable or frequency occurring is assign a 1 bit code ‘0’, other two
    categories area assigned as 2 bit code ‘10’ and ‘11’
    27. How effectiveness of quantization can be improved?
    Introducing an enlarged quantization interval around zero, called a dead
    zero.
    Adapting the size of the quantization intervals from scale to scale. In
    either case, the selected quantization intervals must be transmitted to the
    decoder with the encoded image bit stream.
    28. What are the coding systems in JPEG?
    1. A lossy baseline coding system, which is based on the DCT and is
    adequate for most compression application.
    2. An extended coding system for greater compression, higher
    precision or progressive reconstruction applications.
    3. a lossless independent coding system for reversible compression.
    29. What is JPEG?
    The acronym is expanded as "Joint Photographic Expert Group". It is an
    international standard in 1992. It perfectly Works with color and grayscale images, Many applications e.g., satellite, medical,...
    30. What are the basic steps in JPEG?
    The Major Steps in JPEG Coding involve:
    _ DCT (Discrete Cosine Transformation)
    _ Quantization
    _ Zigzag Scan
    DEPARTMENT OF ECE, ADHIPARASAKTHI COLLEGE OF ENGINEERING, KALAVAI.
    EC2029 DIGITAL IMAGE PROCESSING
    _ DPCM on DC component
    _ RLE on AC Components
    _ Entropy Coding
    31. What is MPEG?
    The acronym is expanded as "Moving Picture Expert Group". It is an international
    standard in 1992. It perfectly Works with video and also used in teleconferencing
    Input image Wavelet transform Quantizer Symbol
    encoder
    Symbol
    decoder
    Inverse wavelet
    transform
    Compressed
    image
    Compressed image
    Decompressed
    Image
    32. Draw the JPEG Encoder.
    33. Draw the JPEG Decoder.
    34. What is zig zag sequence?
    The purpose of the Zig-zag Scan:
    _ To group low frequency coefficients in top of vector.
    _ Maps 8 x 8 to a 1 x 64 vector
    35. Define I-frame
    I-frame is Intraframe or Independent frame. An I-frame is compressed
    independently of all frames. It resembles a JPEG encoded image. It is the reference point for the motion estimation needed to generate subsequent P and P-frame.
    36. Define P-frame
    P-frame is called predictive frame. A P-frame is the compressed difference
    between the current frame and a prediction of it based on the previous I or P-frame
    37. Define B-frame
    B-frame is the bidirectional frame. A B-frame is the compressed difference
    between the current frame and a prediction of it based on the previous I or P-frame or next P-frame. Accordingly the decoder must have access to both past and future reference frames.

    Unit 3 Digital Image Processing Questions with Answers for Ec2029 - Anna University Students

    DIP ( Digital Image Processing )Unit 3 Question and answers for Anna Univ Students.

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    >Unit 1 Two Mark Question and Answers
    >Unit 2 Two Mark Question and Answers

    *16 marks for All 5 Units
    UNIT III IMAGE RESTORATION


    1. What is meant by Image Restoration?
    Restoration attempts to reconstruct or recover an image that has been degraded by
    using a clear knowledge of the degrading phenomenon.

    2. What are the two properties in Linear Operator?
     Additivity
    _ Homogenity

    3. Explain additivity property in Linear Operator?
    H[f1(x,y)+f2(x,y)]=H[f1(x,y)]+H[f2(x,y)]
    The additive property says that if H is the linear operator,the response to a
    sum of two is equal to the sum of the two responses.

    4. How a degradation process is modeled?
    A system operator H, which together with an additive white noise term _(x,y) a
    operates on an input image f(x,y) to produce a degraded image g(x,y).

    5. Explain homogenity property in Linear Operator?
    H[k1f1(x,y)]=k1 H[f1(x,y)]
    The homogeneity property says that,the response to a constant multiple of
    any input is equal to the response to that input multiplied by the same constant.

    6. Give the relation for degradation model for continuous function?
    g(x,y) =-____f(_,_)§(x-_,y-_).d_d_+_(x,y)

    7. What is fredholm integral of first kind?
    g(x,y) = __f(_,_)h(x,_,y,_)d_ d_
    which is called the superposition or convolution or fredholm integral of first kind. It
    states that if the response of H to an impulse is known, the response to any input f(_,_)
    can be calculated by means of fredholm integral.

    8. Define circulant matrix?
    A square matrix, in which each row is a circular shift of the preceding row and the
    first row is a circular shift of the last row, is called circulant matrix.
    he(o) he(M-1) he(M-2)………… he(1)
    he(1) he(0) he(M-1)………. he(2)
    He = ..
    he(M-1) he(M-2) he(M-3)………. he(0)
    g(x,y)
    _(x,y)
    H
    f(x,y)

    9. What is concept algebraic approach?
    The concept of algebraic approach is to estimate the original image which
    minimizes a predefined criterion of performances.

    10. What are the two methods of algebraic approach?
    o Unconstraint restoration approach
    o Constraint restoration approach

    11. Define Gray-level interpolation?
    Gray-level interpolation deals with the assignment of gray levels to pixels
    in the spatially transformed image

    12. What is meant by Noise probability density function?
    The spatial noise descriptor is the statistical behavior of gray level values in the
    noise component of the model.

    13. Why the restoration is called as unconstrained restoration?
    In the absence of any knowledge about the noise ‘n’, a meaningful criterion
    function is to seek an f^ such that H f^ approximates of in a least square sense by
    assuming the noise term is as small as possible.
    Where H = system operator.
    f^ = estimated input image.
    g = degraded image.

    14. Which is the most frequent method to overcome the difficulty to formulate the
    spatial relocation of pixels?
    The point is the most frequent method, which are subsets of pixels whose location
    in the input (distorted) and output (corrected) imaged is known precisely.

    15. What are the three methods of estimating the degradation function?
    1. Observation
    2. Experimentation
    3. Mathematical modeling.

    16. What are the types of noise models?
     Guassian noise
     Rayleigh noise
     Erlang noise
     Exponential noise
     Uniform noise
    _ Impulse noise

    17. Give the relation for guassian noise?
    Guassian noise:
    The PDF guassian random variable Z is given by
    P(Z)=e-(Z-μ)2/2_2/_2__
    Z->Gray level value
    _->standard deviation
    _2->varianze of Z
    μ->mean of the graylevel value Z

    18. Give the relation for rayleigh noise?
    Rayleigh noise:
    The PDF is
    P(Z)= 2(z-a)e-(z—a)2/b/b for Z>=a
    0 for Z=0
    0 for Z<0 mean μ=b/a standard deviation _2=b/a2

    20. Give the relation for Exponential noise?
    Exponential noise The PDF is P(Z)= ae-az Z>=0
    0 Z<0 mean μ=1/a standard deviation _2=1/a2

    21. Give the relation for Uniform noise?
    Uniform noise: The PDF is P(Z)=1/(b-a) if a<=Z<=b 0 otherwise mean μ=a+b/2 standard deviation _2=(b-a)2/12

    22. Give the relation for Impulse noise? Impulse noise: The PDF is P(Z) =Pa for z=a Pb for z=b 0 Otherwise

    23. What is inverse filtering?
    The simplest approach to restoration is direct inverse filtering, an estimate F^(u,v) of the transform of the original image simply by dividing the transform of the degraded image G^(u,v) by the degradation function. F^ (u,v) = G^(u,v)/H(u,v)

    24. What is pseudo inverse filter?
    It is the stabilized version of the inverse filter.For a linear shift invariant system with frequency response H(u,v) the pseudo inverse filter is defined as H-(u,v)=1/(H(u,v) H=/0 0 H=0

    25. What is meant by least mean square filter?
    The limitation of inverse and pseudo inverse filter is very sensitive noise.The wiener filtering is a method of restoring images in the presence of blurr as well as noise.

    26. Give the equation for singular value decomposition of an image?

    U= m=1_r___m _m T This equation is called as singular value decomposition of an image.

    27. Write the properties of Singular value Decomposition(SVD)?
     The SVD transform varies drastically from image to image.  The SVD transform gives best energy packing efficiency for any given image.  The SVD transform is useful in the design of filters finding least square,minimum solution of linear equation and finding rank of large matrices.

    28. What is meant by blind image restoration?

    An information about the degradation must be extracted from the observed image either explicitly or implicitly.This task is called as blind image restoration.

    29. What are the two approaches for blind image restoration?
     Direct measurement _ Indirect estimation

    30. What is meant by Direct measurement?
    In direct measurement the blur impulse response and noise levels are first estimated from an observed image where this parameter are utilized in the restoration.

    31. What is blur impulse response and noise levels?
    Blur impulse response: This parameter is measured by isolating an image of a suspected object within a picture. Noise levels: The noise of an observed image can be estimated by measuring the image covariance over a region of constant background luminence.

    32. What is meant by indirect estimation?
    Indirect estimation method employ temporal or spatial averaging to either obtain a restoration or to obtain key elements of an image restoration algorithm.

    33. Give the difference between Enhancement and Restoration?
    Enhancement technique is based primarily on the pleasing aspects it might present to the viewer. For example: Contrast Stretching. Where as Removal of image blur by applying a deblurrings function is considered a restoration technique.


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    EC2029 Digital Image Processing Two Marks with Answers for Unit 2 Image Enhancement - Anna Univ Questions

    Two Marks for DIP Unit- 2
    Code:EC2029
    Subject: Digital Image Processing

    Get Unit 1 Two Marl Questions with Answers here .
     * 16 Marks for All 5 Units
    For Unit 3,4,and 5 follow this post.If you are in need of any help,feel free to ask it via comments.Also don't forgot to share this post to facebook,twitter.
    Digital Image Processing.


    UNIT II

    1. Specify the objective of image enhancement technique.
    The objective of enhancement technique is to process an image so that the result
    is more suitable than the original image for a particular application.

    2. Explain the 2 categories of image enhancement.
    i) Spatial domain refers to image plane itself & approaches in this
    category are based on direct manipulation of picture image.
    ii) Frequency domain methods based on modifying the image by fourier
    transform.

    3. What is contrast stretching?
    Contrast stretching reduces an image of higher contrast than the original by darkening the levels below m and brightening the levels above m in the image.

    4. What is grey level slicing?
    Highlighting a specific range of grey levels in an image often is desired. Applications
    include enhancing features such as masses of water in satellite imagery and enhancing flaws in x-ray images.

    5. Define image subtraction.
    The difference between 2 images f(x,y) and h(x,y) expressed as,
    g(x,y)=f(x,y)-h(x,y) is obtained by computing the difference between all pairs of corresponding pixels from f and h.

    6. What is the purpose of image averaging?
    An important application of image averagingis in the field of astronomy, where
    imaging with very low light levels is routine, causing sensor noise frequently to
    render single images virtually useless for analysis.

    7. What is meant by masking?
    Mask is the small 2-D array in which the values of mask co-efficient determines the
    nature of process.
    The enhancement technique based on this type of approach is referred to as
    mask processing.

    8. Give the formula for negative and log transformation.
    Negative: S=L-1-r
    Log: S = c log(1+r)
    Where c-constant and r 0

    9. What is meant by bit plane slicing?
    Instead of highlighting gray level ranges, highlighting the contribution made to
    total image appearance by specific bits might be desired. Suppose that each pixel in
    an image is represented by 8 bits. Imagine that the image is composed of eight 1-bit planes, ranging from bit plane 0 for LSB to bit plane-7 for MSB.

    10. Define histogram.
    The histogram of a digital image with gray levels in the range [0, L-1] is a
    discrete function h(rk)=nk.
    rk-kth gray level nk-number of pixels in the image having gray level rk.

    11. What is meant by histogram equalization?
    k k
    Sk= T(rk) = _ Pr(rj) = _ nj/n where k=0,1,2,….L-1
    j=0 j=0
    This transformation is called histogram equalization.

    12. Differentiate linear spatial filter and non-linear spatial filter.
    s.no. Linear spatial filter Non-linear spatial filter
    1.
    2.
    Response is a sum of products of
    the filter co-efficient.
    R = w(-1,-1) f(x-1,y-1) +
    w(-1,0) f(x-1,y) + … +
    w(0,0) f(x,y) + … +
    w(1,0) f(x+1,y) +
    w(1,1) f(x+1,y+1).
    They do not explicitly use coefficients
    in the sum-of-products.
    R = w1z1 + w2z2 + … +w9z9
    9
    = _ wizi
    i=1

    13. Give the mask used for high boost filtering.
    -1 -1 -1
    -1 A+8 -1
    -1 -1 -1
    0 -1 0
    -1 A+4 -1
    0 -1 0

    14. What is meant by laplacian filter?
    The laplacian for a function f(x,y) of 2 variables is defined as,
    2 2 2 2 2
    f = _ f / _ x + _ f / _ y

    15. Write the steps involved in frequency domain filtering.
    x+y

    1. Multiply the input image by (-1) to center the transform.
    2. Compute F(u,v), the DFT of the image from (1).
    3. Multiply F(u,v) by a filter function H(u,v).
    4. Compute the inverse DFT of the result in (3).
    5. Obtain the real part of the result in (4).
    x+y
    6. Multiply the result in (5) by (-1)

    16. Give the formula for transform function of a Butterworth low pass filter.
    The transfer function of a Butterworth low pass filter of order n and with cut off
    frequency at a distance D0 from the origin is,
    2n
    H(u,v) = 1 / 1 + [ D(u,v) / D0 ]
    2 2 1/2
    Where D(u,v) = [(u – M/2) + (v-N/2) ]

    17. What do you mean by Point processing?
    Image enhancement at any Point in an image depends only on the gray level at
    that point is often referred to as Point processing.

    18. What is Image Negatives?
    The negative of an image with gray levels in the range [0, L-1] is obtained by
    using the negative transformation, which is given by the expression.
    s = L-1-r
    Where s is output pixel
    r is input pixel

    19. Define Derivative filter?
    For a function f (x, y), the gradient f at co-ordinate (x, y) is defined as the vector
    _f = _f/_x
    _f/_y
    _f = mag (_f) = {[(_f/_x) 2 +(_f/_y) 2 ]} ½

    20. Explain spatial filtering?
    Spatial filtering is the process of moving the filter mask from point to point in an
    image. For linear spatial filter, the response is given by a sum of products of the filter coefficients, and the corresponding image pixels in the area spanned by the filter mask.

    21. What is a Median filter?
    The median filter replaces the value of a pixel by the median of the gray levels in
    the neighborhood of that pixel.

    22. What is maximum filter and minimum filter?
    The 100th percentile is maximum filter is used in finding brightest points in an
    image. The 0th percentile filter is minimum filter used for finding darkest points in an image.

    23. Write the application of sharpening filters?
    1. Electronic printing and medical imaging to industrial application
    2. Autonomous target detection in smart weapons.

    24. Name the different types of derivative filters?
    1. Perwitt operators
    2. Roberts cross gradient operators
    3. Sobel operators

    EC2029 Digital Image Processing Two Marks with Answers for Unit 1 - Anna Univ Questions

    Two Marks questions with Answers for DIP (Digital Image Processing) of Anna University Students for the Sub Code:EC2029.

    We have given questions for each units just folow the links at the bottom of this post for next unit questions.Share this to your friends at facebook,twitter,make it useful.

    Digital Image Processing

     * 16 Marks for All 5 Units
     * Two Marks for Unit 1,2,3,4
    TWO MARK QUESTION with ANSWERS

    UNIT I

    1. Define Image?
    An image may be defined as two dimensional light intensity function f(x, y)
    where x and y denote spatial co-ordinate and the amplitude or value of f at any point (x, y) is called intensity or grayscale or brightness of the image at that point.

    2. What is Dynamic Range?
    The range of values spanned by the gray scale is called dynamic range of an
    image. Image will have high contrast, if the dynamic range is high and image will have dull washed out gray look if the dynamic range is low.

    3. Define Brightness?
    Brightness of an object is the perceived luminance of the surround. Two objects
    with different surroundings would have identical luminance but different brightness.

    4. Define Tapered Quantization?
    If gray levels in a certain range occur frequently while others occurs rarely, the
    quantization levels are finely spaced in this range and coarsely spaced outside of it. This method is sometimes called Tapered Quantization.

    5. What do you meant by Gray level?
    Gray level refers to a scalar measure of intensity that ranges from black to grays
    and finally to white.

    6. What do you meant by Color model?
    A Color model is a specification of 3D-coordinates system and a subspace within
    that system where each color is represented by a single point.

    7. List the hardware oriented color models?
    1. RGB model
    2. CMY model
    3. YIQ model
    4. HSI model

    8. What is Hue of saturation?
    Hue is a color attribute that describes a pure color where saturation gives a
    measure of the degree to which a pure color is diluted by white light.

    9. List the applications of color models?
    1. RGB model--- used for color monitor & color video camera
    2. CMY model---used for color printing
    3. HIS model----used for color image processing4. YIQ model---used for color picture transmission

    10. What is Chromatic Adoption?
    The hue of a perceived color depends on the adoption of the viewer. For example,
    the American Flag will not immediately appear red, white, and blue of the viewer has been subjected to high intensity red light before viewing the flag. The color of the flag will appear to shift in hue toward the red component cyan.

    11. Define Resolutions?
    Resolution is defined as the smallest number of discernible detail in an image.
    Spatial resolution is the smallest discernible detail in an image and gray level resolution refers to the smallest discernible change is gray level.

    12. What is meant by pixel?
    A digital image is composed of a finite number of elements each of which has a
    particular location or value. These elements are referred to as pixels or image elements or picture elements or pels elements.

    13. Define Digital image?
    When x, y and the amplitude values of f all are finite discrete quantities , we call
    the image digital image.

    14. What are the steps involved in DIP?
    1. Image Acquisition
    2. Preprocessing
    3. Segmentation
    4. Representation and Description
    5. Recognition and Interpretation

    15. What is recognition and Interpretation?
    Recognition means is a process that assigns a label to an object based on the
    information provided by its descriptors.
    Interpretation means assigning meaning to a recognized object.

    16. Specify the elements of DIP system?
    1. Image Acquisition
    2. Storage
    3. Processing
    4. Display

    17. Explain the categories of digital storage?
    1. Short term storage for use during processing.
    2. Online storage for relatively fast recall.
    3. Archical storage for infrequent access.

    18. What are the types of light receptors?
    The two types of light receptors are
    1. Cones and
    2. Rods

    19. Differentiate photopic and scotopic vision?
    Photopic vision Scotopic vision
    1. The human being can resolve the fine details with these cones because each one is connected to its own nerve end.
    2. This is also known as bright light vision. Several rods are connected to one nerve end. So it gives the overall picture of the image. This is also known as thin light vision.

    20. How cones and rods are distributed in retina?
    In each eye, cones are in the range 6-7 million and rods are in the range 75-150
    million.

    21. Define subjective brightness and brightness adaptation?
    Subjective brightness means intensity as preserved by the human visual system.
    Brightness adaptation means the human visual system can operate only from
    scotopic to glare limit. It cannot operate over the range simultaneously. It accomplishes this large variation by changes in its overall intensity.

    22. Define weber ratio
    The ratio of increment of illumination to background of illumination is called as
    weber ratio.(ie) _i/i
    If the ratio (_i/i) is small, then small percentage of change in intensity is needed
    (ie) good brightness adaptation.
    If the ratio (_i/i) is large , then large percentage of change in intensity is needed
    (ie) poor brightness adaptation.

    23. What is meant by machband effect?
    Machband effect means the intensity of the stripes is constant. Therefore it
    preserves the brightness pattern near the boundaries, these bands are called as machband effect.

    24. What is simultaneous contrast?
    The region reserved brightness not depend on its intensity but also on its
    background. All centre square have same intensity. However they appear to the eye to become darker as the background becomes lighter.

    25. What is meant by illumination and reflectance?
    Illumination is the amount of source light incident on the scene. It is represented
    as i(x, y).
    Reflectance is the amount of light reflected by the object in the scene. It is
    represented by r(x, y).

    26. Define sampling and quantization

    Sampling means digitizing the co-ordinate value (x, y).
    Quantization means digitizing the amplitude value.

    27. Find the number of bits required to store a 256 X 256 image with 32 gray levels?
    32 gray levels = 25
    = 5 bits
    256 * 256 * 5 = 327680 bits.

    28. Write the expression to find the number of bits to store a digital image?
    The number of bits required to store a digital image is
    b=M X N X k
    When M=N, this equation becomes
    b=N^2k

    30. What do you meant by Zooming of digital images?
    Zooming may be viewed as over sampling. It involves the creation of new pixel
    locations and the assignment of gray levels to those new locations.

    31. What do you meant by shrinking of digital images?
    Shrinking may be viewed as under sampling. To shrink an image by one half, we
    delete every row and column. To reduce possible aliasing effect, it is a good idea to blue an image slightly before shrinking it.

    32. Write short notes on neighbors of a pixel.
    The pixel p at co-ordinates (x, y) has 4 neighbors (ie) 2 horizontal and 2 vertical
    neighbors whose co-ordinates is given by (x+1, y), (x-1,y), (x,y-1), (x, y+1). This is called as direct neighbors. It is denoted by N4(P)
    Four diagonal neighbors of p have co-ordinates (x+1, y+1), (x+1,y-1), (x-1, y-1),
    (x-1, y+1). It is denoted by ND(4).
    Eight neighbors of p denoted by N8(P) is a combination of 4 direct neighbors and
    4 diagonal neighbors.

    33. Explain the types of connectivity.
    1. 4 connectivity
    2. 8 connectivity
    3. M connectivity (mixed connectivity)

    34. What is meant by path?
    Path from pixel p with co-ordinates (x, y) to pixel q with co-ordinates (s,t) is a
    sequence of distinct pixels with co-ordinates.

    35. Give the formula for calculating D4 and D8 distance.
    D4 distance ( city block distance) is defined by
    D4(p, q) = |x-s| + |y-t|
    D8 distance(chess board distance) is defined by

    D8(p, q) = max(|x-s|, |y-t|).

    36. What is geometric transformation?
    Transformation is used to alter the co-ordinate description of image.
    The basic geometric transformations are
    1. Image translation
    2. Scaling
    3. Image rotation

    37. What is image translation and scaling?
    Image translation means reposition the image from one co-ordinate location to
    another along straight line path.
    Scaling is used to alter the size of the object or image (ie) a co-ordinate system is
    scaled by a factor.

    38. What is the need for transform?
    The need for transform is most of the signals or images are time domain signal
    (ie) signals can be measured with a function of time. This representation is not always best. For most image processing applications anyone of the mathematical transformation are applied to the signal or images to obtain further information from that signal.

    39. Define the term Luminance?
    Luminance measured in lumens (lm), gives a measure of the amount of energy an
    observer perceiver from a light source.

    40. What is Image Transform?
    An image can be expanded in terms of a discrete set of basis arrays called basis
    images. These basis images can be generated by unitary matrices. Alternatively, a given NxN image can be viewed as an N^2x1 vectors. An image transform provides a set of coordinates or basis vectors for vector space.

    41. What are the applications of transform.
    1) To reduce band width
    2) To reduce redundancy
    3) To extract feature.

    42. Give the Conditions for perfect transform?
    Transpose of matrix = Inverse of a matrix. Orthoganality.

    43. What are the properties of unitary transform?
    1) Determinant and the Eigen values of a unitary matrix have unity magnitude
    2) the entropy of a random vector is preserved under a unitary Transformation
    3) Since the entropy is a measure of average information, this means information
    is preserved under a unitary transformation.

    44. Define fourier transform pair?
    The fourier transform of f(x) denoted by F(u) is defined by

    F(u)= _ f(x) e-j2_ux dx ----------------(1)
    -
    The inverse fourier transform of f(x) is defined by

    f(x)= _F(u) ej2_ux dx --------------------(2)
    -
    The equations (1) and (2) are known as fourier transform pair.

    45. Define fourier spectrum and spectral density?
    Fourier spectrum is defined as
    F(u) = |F(u)| e j_(u)
    Where
    |F(u)| = R2(u)+I2(u)
    _(u) = tan-1(I(u)/R(u))
    Spectral density is defined by
    p(u) = |F(u)|2
    p(u) = R2(u)+I2(u)

    46. Give the relation for 1-D discrete fourier transform pair?
    The discrete fourier transform is defined by
    n-1
    F(u) = 1/N _ f(x) e –j2_ux/N
    x=0
    The inverse discrete fourier transform is given by
    n-1
    f(x) = _ F(u) e j2_ux/N
    x=0
    These equations are known as discrete fourier transform pair.

    47. Specify the properties of 2D fourier transform.
    The properties are
    1. Separability
    2. Translation
    3. Periodicity and conjugate symmetry
    4. Rotation
    5. Distributivity and scaling
    6. Average value
    7. Laplacian
    8. Convolution and correlation
    9. sampling


    48. Explain separability property in 2D fourier transform
    The advantage of separable property is that F(u, v) and f(x, y) can be obtained by
    successive application of 1D fourier transform or its inverse.
    n-1
    F(u, v) =1/N _ F(x, v) e –j2_ux/N
    x=0
    Where
    n-1
    F(x, v)=N[1/N _ f(x, y) e –j2_vy/N
    y=0

    49. Properties of twiddle factor.
    1. Periodicity
    WN^(K+N)= WN^K
    2. Symmetry
    WN^(K+N/2)= -WN^K

    50. Give the Properties of one-dimensional DFT
    1. The DFT and unitary DFT matrices are symmetric.
    2. The extensions of the DFT and unitary DFT of a sequence and their
    inverse transforms are periodic with period N.
    3. The DFT or unitary DFT of a real sequence is conjugate symmetric
    about N/2.

    51. Give the Properties of two-dimensional DFT
    1. Symmetric
    2. Periodic extensions
    3. Sampled Fourier transform
    4. Conjugate symmetry.

    52. What is meant by convolution?
    The convolution of 2 functions is defined by
    f(x)*g(x) = f() .g(x- ) d
    where is the dummy variable

    53. State convolution theorem for 1D
    If f(x) has a fourier transform F(u) and g(x) has a fourier transform G(u)
    then f(x)*g(x) has a fourier transform F(u).G(u).
    Convolution in x domain can be obtained by taking the inverse fourier
    transform of the product F(u).G(u).
    Convolution in frequency domain reduces the multiplication in the x
    domain
    F(x).g(x) _ F(u)* G(u)
    These 2 results are referred to the convolution theorem.

    54. What is wrap around error?
    The individual periods of the convolution will overlap and referred to as
    wrap around error

    55. Give the formula for correlation of 1D continuous function.
    The correlation of 2 continuous functions f(x) and g(x) is defined by
    f(x) o g(x) = f*() g(x+) d

    56. What are the properties of Haar transform.
     1. Haar transform is real and orthogonal.
    2. Haar transform is a very fast transform
    3. Haar transform has very poor energy compaction for images
    4. The basic vectors of Haar matrix sequensly ordered.

    57. What are the Properties of Slant transform
    1. Slant transform is real and orthogonal.
    2. Slant transform is a fast transform
    3. Slant transform has very good energy compaction for images
    4. The basic vectors of Slant matrix are not sequensely ordered.

    58. Specify the properties of forward transformation kernel?
    The forward transformation kernel is said to be separable if g(x, y, u, v)
    g(x, y, u, v) = g1(x, u).g2(y, v)
    The forward transformation kernel is symmetric if g1 is functionally equal to g2
    g(x, y, u, v) = g1(x, u). g1(y,v)

    59. Define fast Walsh transform.
    The Walsh transform is defined by
    n-1 x-1
    w(u) = 1/N _ f(x) _ (-1) bi(x).bn-1-i (u)
    x=0 i=0

    60. Give the relation for 1-D DCT.
    The 1-D DCT is,
    N-1
    C(u)=_(u)_ f(x) cos[((2x+1)u_)/2N] where u=0,1,2,….N-1
    X=0
    N-1
    Inverse f(x)= _ _(u) c(u) cos[((2x+1) u_)/2N] where x=0,1,2,…N-1
    V=0

    61.Write slant transform matrix SN.
    SN = 1/_2

    62. Define Haar transform.
    The Haar transform can be expressed in matrix form as,
    T=HFH
    Where F = N X N image matrix
    H = N X N transformation matrixT = resulting N X N transform.

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    Important Questions for 141302 Analog and Digital Communication,3rd Sem of CSE students - Anna Univ of Technology Nov/Dec 2011

    For Anna University of Technology ,Computer Science Engg Students,here are the important questions for the subject ADC.
    Get Analog and Digital Communication faq questions from each units,prepare well and do well.

    Code:141302
    Subject : Analog and Digital Comm .
    Second Year Third Semester -For CSE Students

    141302 - Analog and digital Communication

    UNIT I

    1. Explain how Carson’s rule of bandwidth in FM is obtained. For an FM modulator with peak frequency deviation f=5 kHz modulating frequency fm=5kHz, with amplitude of carrier 5V and frequency 500 kHz, determine the bandwidth using Carson’s rule

    2. Derive an expression for a single tone FM signal and draw its frequency spectrum.

    3. Define amplitude modulation. Drive the relation between the total transmitted power and carrier power in an AM system when several frequencies simultaneously modulated acarrier.

    4. Define FM and PM modulation, derive their equations.

    5. In angle modulation, explain frequency devation, percent modulation, phase deviation and modulation index with suitable example.


    UNIT II

    1. Explain with neat diagrams the FSK technique, transmitter and receiver blocks
    2. With neat diagram explain the generation of a DPSK signal and recovering the data from
    the DPSK signal
    3. Explain quadrature amplitude modulation with the help of relevant diagrams.
    4. Discuss the QPSK transmission system with relevant diagrams.

    UNIT III

    1. Explain PCM and differential PCM with the help of block diagrams.
    2. Explain the basic principle of quantization and quantization error
    3. What are the drawbacks of delta modulation and how are they overcome in adaptive delta
    modulation? explain with the help of a neat block diagram
    4. Describe DPCM transmitter and receiver with suitable block diagram.


    UNIT IV
    1. Explain the detail about the parallel interface with control signals and timing information
    2. Explain the different types of data transmission
    3. How are errors detected and corrected in data communication?
    4. Discuss the following : Synchronous modem , Asynchronous modem ,Low speed modem ,medium and high speed modem

    UNIT V
    1. Explain fast and slow frequency hopping techniques used in spread spectrum.
    2. With help of neat block diagram, explain DS spread spectrum system with coherent binary PSK
    3. Compare TDMA,FDMA CSMA multiple access techniques.
    4. Explain the working of multi pulse excited LPC and code excited LPC by suitable Diagrams
    5. For a linear feedback shift register with three stages (m=3),evaluate the maximum length PN sequence for feedback taps =(3,1).Draw the schematic arrangement and verify all the properties of PN sequence in generated output. Sketch the sequence, its autocorrelation function and PSD function if chip rate is 10MHz.


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    AIEEE 2012 Important Dates - Check Here Engineering Entrance Exam

    AIEEE 2012 Complete Notifications
    All India Engineering Entrance Examination (AIEEE)for the year 2012 has been fast approaching ,those who have eligible can apply for it.The AIEEE board has released the notifications recently,which we given here in this page.


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    APSRTC Recruitment for Junior Assistance 2011 - 2012

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    PhD Scholorships for National Board for Higher Mathematics 2012-2013 - Education Scholorships

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    Education Sholorships for Delhi Students now get upto Rs.5lakhs - Scholorships

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