Numerical Analysis, Books A La Carte Edition (3rd Edition)
3rd Edition
ISBN: 9780134697338
Author: Timothy Sauer
Publisher: PEARSON
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Chapter 11.2, Problem 3CP
Obtain a grayscale image file of your choice, and use the imread command to import into MATLAB. Crop the resulting matrix so that each dimension is a multiple of 8. If necessary, converting a color RGB image to gray scale can be accomplished by the standard formula (11.15).
a. Extract an
pixel block, for example, by using the MATLAB command xb=x(81:88, 81:88). Display the block with the imagesc command.
b. Apply the 2D-DCT.
c. Quantize by using linear quantization with
.
d. Reconstruct the block by using the inverse 2D-DCT. and compare with the original. Use commands MATLAB colormap(gray) and imagesc(X [0 255]).
e. Carry out (a)-(d) for all
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Chapter 11 Solutions
Numerical Analysis, Books A La Carte Edition (3rd Edition)
Ch. 11.1 - Use the 22 DCT matrix and Theorem 11.2 to find the...Ch. 11.1 - Prob. 2ECh. 11.1 - Prob. 3ECh. 11.1 - Prob. 4ECh. 11.1 - Prob. 5ECh. 11.1 - (a) Prove the trigonometric formula...Ch. 11.1 - Prob. 7ECh. 11.1 - Plot the data from Exercise 3, along with the DCT...Ch. 11.1 - Plot the data along with the m=4,6, and 8 DCT...Ch. 11.1 - Plot the function f(t), the data points...
Ch. 11.2 - Prob. 1ECh. 11.2 - Prob. 2ECh. 11.2 - Prob. 3ECh. 11.2 - Use the quantization matrix Q=[ 102020100 ] to...Ch. 11.2 - Prob. 1CPCh. 11.2 - Prob. 2CPCh. 11.2 - Obtain a grayscale image file of your choice, and...Ch. 11.2 - Carry out the steps of Computer Problem 3, but...Ch. 11.2 - Obtain a color image file of your choice. Carry...Ch. 11.2 - Prob. 6CPCh. 11.3 - Prob. 1ECh. 11.3 - Prob. 2ECh. 11.3 - Draw a Huffman tree and convert the message,...Ch. 11.3 - Translate the transformed, quantized image...Ch. 11.4 - Prob. 1ECh. 11.4 - Prob. 2ECh. 11.4 - Prob. 3ECh. 11.4 - Prob. 4ECh. 11.4 - Prob. 5ECh. 11.4 - Prob. 6ECh. 11.4 - Prob. 7ECh. 11.4 - Prob. 8ECh. 11.4 - Prob. 9ECh. 11.4 - Prob. 10ECh. 11.4 - Prob. 1CPCh. 11.4 - Prob. 2CPCh. 11.4 - Prob. 1SACh. 11.4 - Prob. 2SACh. 11.4 - Prob. 3SACh. 11.4 - Prob. 4SACh. 11.4 - Prob. 5SACh. 11.4 - Prob. 6SACh. 11.4 - Build two separate subprograms, a coder and a...
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