|''|''|||''|'''|||'| IV B.Tech I Semester Supplementary Examinations, Feb/Mar - 2015 DIGITAL IMAGE PROCESSING (Common to Electronics & Communication Engineering and Electronics & Computer Engineering) Time: 3 hours Max. Marks: 75 Answer any FIVE Questions All Questions carry equal marks ***** 1 a) Define the terms sampling and quantization. What is their role in image quality and size? [8] b) Write a brief note about the components of image processing systems [7] 2 a) Explain how Fourier transforms are useful in digital image processing? [8] b) What is meant by Enhancement by point processing? Explain. [7] 3 a) A binary image contains straight line oriented horizontally, vertically at 45 , and at -45 . Give a set of 3×3 masks that can be used to detect 1-pixel-long breaks in these lines. Assume that the grey level of the lines is 1 and that the gray level of the background is 0. [7] b) Show that how Hough transform can be used to link edges. [8] 4 a) Discuss about thinning and boundary extraction in basic morphological algorithms. [8] b) What is the limiting effect of repeatedly dilating an image? Assume that a trivial (one point) structuring element is not used. [7] 5 a) Compute the two-dimensional wavelet transform with respect to Haar wavelets of the following 2×2 image. Draw the required filter bank and label all inputs and outputs with the proper arrays. [8] b) Explain classification of watermarks. [7] 6 a) What is meant by Luminance, brightness, Radiance & trichromatic Coefficients. [7] b) Explain the conversion from HSI to RGB color model. [8] 7 a) Define image restoration. Explain the operation of inverse filtering. [7] b) Explain in detail Constrained Least Squares Filtering. [8] 8 a) Explain Convolution theorem. [6] b) Explain about following smoothing frequency domain filters. i) Low Pass Spatial Filtering ii) Median Filtering [9] Code No: R41043 Set No. 1 R10 1 of 1 www.jntuking.com www.jntuking.com www.jntuking.com
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IV B.Tech I Semester Supplementary Examinations, Feb/Mar - 2015
DIGITAL IMAGE PROCESSING
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
*****
1 a) Define the terms sampling and quantization. What is their role in image quality
and size? [8]
b) Write a brief note about the components of image processing systems [7]
2 a) Explain how Fourier transforms are useful in digital image processing? [8]
b) What is meant by Enhancement by point processing? Explain. [7]
3 a) A binary image contains straight line oriented horizontally, vertically at 45 ,
and at -45 . Give a set of 3×3 masks that can be used to detect 1-pixel-long
breaks in these lines. Assume that the grey level of the lines is 1 and that the
gray level of the background is 0. [7]
b) Show that how Hough transform can be used to link edges. [8]
4 a) Discuss about thinning and boundary extraction in basic morphological
algorithms. [8]
b) What is the limiting effect of repeatedly dilating an image? Assume that a
trivial (one point) structuring element is not used. [7]
5 a) Compute the two-dimensional wavelet transform with respect to Haar wavelets
of the following 2×2 image. Draw the required filter bank and label all inputs
and outputs with the proper arrays. [8]
b) Explain classification of watermarks. [7]
6 a) What is meant by Luminance, brightness, Radiance & trichromatic
Coefficients. [7]
b) Explain the conversion from HSI to RGB color model. [8]
7 a) Define image restoration. Explain the operation of inverse filtering. [7]
b) Explain in detail Constrained Least Squares Filtering. [8]
8 a) Explain Convolution theorem. [6]
b) Explain about following smoothing frequency domain filters.
i) Low Pass Spatial Filtering ii) Median Filtering [9]
Code No: R41043 Set No. 1 R10
1 of 1
www.jntuking.com
www.jntuking.com
www.jntuk
ing.co
m
|''|''|||''|'''|||'|
IV B.Tech I Semester Supplementary Examinations, Feb/Mar - 2015
DIGITAL IMAGE PROCESSING
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
*****
1 a) In a digital image of size 600X 450, if bits of memory is allocated per sample,
i) How many quantization levels are possible?
ii) What is the size of memory in kB?
[8]
b) What in meant by Moire patterns? What are the reasons for Occurrence of such
patterns?
[7]
2 a) Explain the properties of Fourier transform. [8]
b) Does the zero-crossing method for edge finding always result in edges that are
closed contours? Give reason.
[7]
3 a) Discuss in detail about threshold selection based on boundary characteristics. [7]
b) Discuss in detail about the procedure involved in Histogram matching.
[8]
4 a) What do you understand by erosion and dilation in morphological operation?
Explain in detail.
[8]
b) Discuss about gray scale morphology.
[7]
5 a) What is meant by image segmentation? Mention the applications of image
Segmentation.
[8]
b) Explain about detection of discontinuities.
[7]
6 a) What is meant by error tree compression? Explain the variable length coding. [8]
b) Draw the general compression system model & Explain?
[7]
7 a) Give the schematic sketch of R G B color cube? Indicate the primary color
vertices on the cube.
[8]
b) Describe how the gray levels vary in the R,G and B primary images that make up
the front face of the color cube.
[7]
8 a) Explain adaptive filter and also what the two levels of adaptive median filtering
algorithms are.
[8]
b) Differentiate constrained and unconstrained restoration. [7]
Code No: R41043 Set No. 2 R10
1 of 1
www.jntuking.com
www.jntuking.com
www.jntuk
ing.co
m
|''|''|||''|'''|||'|
IV B.Tech I Semester Supplementary Examinations, Feb/Mar - 2015
DIGITAL IMAGE PROCESSING
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time : 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
*****
1 a) Define the terms i) 4-adjacent ii) 8-adjacent and iii) m-adjacent
Give suitable examples
[8]
b) Differentiate between uniform sampling & Non-uniform sampling?
[7]
2 a) Prove that for continuous signal Histogram equalization results in flat histogram. [7]
b) Differentiate the spatial image enhancement and image enhancement in
frequency domain?
[8]
3 a) Show that crispened image can be obtained by convolving it with the mask.
0 -1 0
-1 5 -1
0 -1 0
[7]
b) Explain in detail image averaging and image subtraction.
[8]
4 a) Explain about algebraic approach to image restoration. [8]
b) Explain with the block diagram lossless predictive coding.
[7]
5 a) Consider the following RGB Triplets. Convert each triplets to CMY and YIQ.
i) ( 0 1 0) ii) ( 1 1 0 ) iii) ( 1 0 1 )
[8]
b) How we can use morphology in coding redundancy?
[7]
6 a) Illustrate with suitable examples how gradient operators used for edge detection
of medical images.
[8]
b) Elaborate the process of dam construction along with watershed segmentation
algorithm.
[7]
7 a) Explain about skeletons and convex hull in detail. [8]
b) Briefly explain about image compression.
[7]
8 a) Under what circumstances is the DWT a better choice than the CWT ? Are there
times when the CWT is better than the DWT?
[8]
b) Explain the basic principles of KL transforms. What are its applications? [7]
Code No: R41043 Set No. 3 R10
1 of 1
www.jntuking.com
www.jntuking.com
www.jntuk
ing.co
m
|''|''|||''|'''|||'|
IV B.Tech I Semester Supplementary Examinations, Feb/Mar - 2015
DIGITAL IMAGE PROCESSING
(Common to Electronics & Communication Engineering and Electronics & Computer
Engineering)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry equal marks
*****
1 a) Discuss a brief survey of image processing applications. [8]
b) Assume that a 15m high structure is observed from a distance of 75m. what is
the size of the retinal image.
[7]
2 a) What is meant by Histogram of an image? Sketch Histograms of basic image
types.
[8]
b) What are the various coding techniques for error-free compression and discuss
in detail Huff-man coding.
[7]
3 a) Explain about discrete wavelet transform of one variable and two variables. [8]
b) Write about image smoothing in frequency domain.
[7]
4 a) Explain the effect of diagonalization in the degradation model. [7]
b) Give the expression for pdf of the following and plot them