HW4sol7eces682

# HW4sol7eces682 - Drexel University Department of Electrical...

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Drexel University Department of Electrical and Computer Engineering ECES 682, Introduction to Image Processing Spring 2006 Homework 4 Solution Due May 22, 2006 7. The purpose of this exercise is to examine the effect of various distortions on an image and on the image appearance. This excursive is to be done with image eagle.jpg. (a) Quantize the rgb image to 3 bits (8 levels). A matrix with values in the range of 0-255 can be quantized with the command new = 32*round(old/ 32). This image will be called Qrgb. (b) Convert the image to YCbCr coordinates (there’s a MATLAB command for this) quantize the Cb and Cr planes to 3 bits, and convert the image to rgb. This will be called Qycbcr. (c) Compress the image with quality 25. This will be called JPEG25. Examine the three images and compare. Comment on the difference. Examine (print) the green plane of the images. Compare and comment. Examine and print the Y plane on the three images. Compare and comment. Examine and print the Cb plane of the images. Compare and comment.

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## This note was uploaded on 02/09/2010 for the course ECES 682 taught by Professor Dand during the Spring '09 term at Drexel.

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HW4sol7eces682 - Drexel University Department of Electrical...

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