Hi guys, For the JPEG encoding processes, after the DCT and quantization of each 8*8 blocks, two Zig-Zag encoding modes can be used. One is sequential encoding and another one is progressive encoding. While sequential encoding encodes coefficients of a single block at a time (in a zig-zag manner), progressive encoding encodes similar-positioned coefficients of all blocks in one go, followed by the next positioned coefficients of all blocks, and so on. My question is, would those two different encoding modes produce the same coefficient matrix? The point that I am not quite sure about is that, for example a 256*256 image. When I doing the progressive encoding, I encode the DC coefficients from each 8*8 block first, then do I concatenate these 1024 DC coefficients together or just keep them in their original blocks and move onto the next positioned AC coefficient? Thank you very much Neil
JPEG encoding
Started by ●June 28, 2007