3 Sep 2003
CS 6210: Module 4
8/24
Joint Photography Experts Group
¡Breaks image into 8×8
pixel blocks, each pixel 24 bits (YUV channels = 3×8
bits each)
¡Compresses each block
separately, without reference to neighbors
Discrete Cosine Transform
(DCT - exact)
(DCT - exact)
Quantize (Round off - lossy)
Coding
(Compression – e.g., LZW,Huffman)
(Compression – e.g., LZW,Huffman)
