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Recent questions and answers in Digital Image Processing

1 vote
1 answer
1
Given a simple image of size $10 \times 10$ whose histogram models the symbol probabilities and is given by $P_{1}$ $P_{2}$ $P_{3}$ $P_{4}$ a b c d The first order estimate of image entropy is maximum when $a = 0, b = 0, c = 0, d = 1$ $a=\frac{1}{2}, b=\frac{1}{2}, c=0, d=0$ $a=\frac{1}{3}, b=\frac{1}{3}, c=\frac{1}{3}, d=0$ $a=\frac{1}{4}, b=\frac{1}{4}, c=\frac{1}{4}, d=\frac{1}{4}$
answered Dec 5, 2018 in Digital Image Processing Taniya Bal 1.2k views
0 votes
2 answers
2
Given an image of size $1024 \times 1024$ pixels in which intensity of each pixel is an $8$-bit quality. It requires _______ of storage space if the image is not compressed. One Terabyte One Megabyte $8$ Megabytes $8$ Terabytes
answered May 19, 2018 in Digital Image Processing Prasanjeet Ghosh 1.9k views
2 votes
1 answer
3
Consider the conditional entropy and mutual information for the binary symmetric channel. The input source has alphabet $X=\{0,1\}$ and associated probabilities ${\dfrac{1}{2}, \dfrac{1}{2}}$. The channel matrix is $\begin{pmatrix} 1-p & p \\ p & 1-p \end{pmatrix}$ wgere p is the transition probability. Then ... is given by: $1$ $-p \log(p)-(1-p) \log(1-p)$ $1+p \log(p)+(1-p) \log(1-p)$ $0$
answered Apr 7, 2017 in Digital Image Processing Allwin 1.3k views
4 votes
3 answers
4
7 votes
3 answers
5
If the frame buffer has 8 bits per pixel and 8 bits are allocated for each of the $R, G, B$ components, what would be the size of the lookup table? $24$ bytes $1024$ bytes $768$ bytes $256$ bytes
answered Nov 2, 2016 in Digital Image Processing Arunav Khare 6.2k views
2 votes
1 answer
6
Which of the following is used for the boundary representation of an image object? Quad Tree Projections Run length coding Chain codes
answered Sep 7, 2016 in Digital Image Processing Sanjay Sharma 1.3k views
2 votes
1 answer
7
In an image compression system 16384 bits are used to represent 256 $\times$ 256 image with 256 gray levels. What is the compression ratio for this system? 1 2 4 8
answered Jul 7, 2016 in Digital Image Processing Krishnadulal Dalapat 797 views
1 vote
1 answer
8
The quantiser in an image-compression system is a lossy element which exploits the psychovisual redundancy lossless element which exploits the psychovisual redundancy lossy element which exploits the statistical redundancy lossless element which exploits the statistical redundancy
answered Jul 7, 2016 in Digital Image Processing shekhar chauhan 1.1k views
0 votes
0 answers
9
0 votes
0 answers
10
spatial masks
[closed]
asked Jun 30, 2016 in Digital Image Processing Sanjay Sharma 156 views
4 votes
1 answer
12
3 votes
1 answer
13
What does a pixel mask mean? string containing only 1's string containing only 0's string containing two 0's string containing 1's and 0’s
answered Jun 10, 2016 in Digital Image Processing shekhar chauhan 4.9k views
0 votes
0 answers
14
0 votes
0 answers
15
14. If the pixels of an image are shuffled then the parameter that may change is (A) Histogram (B) Mean (C) Entropy (D) Covariance
asked May 6, 2016 in Digital Image Processing Sanjay Sharma 339 views
0 votes
1 answer
16
In an image compression system 16384 bits are used to represent 256 × 256 image with 256 gray levels. What is the compression ratio for this system ? (A) 1 (B) 2 (C) 4 (D) 8
answered Apr 28, 2016 in Digital Image Processing Arjun 2.7k views
0 votes
0 answers
17
If the Fourier transform of the function f(x,y) is F(m,n), then the Fourier transform of the function f(2x,2y) is $\frac{1}{4} F (\frac{m}{2}, \frac{n}{2})$ $\frac{1}{4} F (2m, 2n)$ $\frac{1}{4} F (m,n)$ $\frac{1}{4} F (\frac{m}{4}, \frac{n}{4})$
asked Apr 13, 2016 in Digital Image Processing Sanjay Sharma 973 views
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