Adaptive block size image compression method and system

Details Adaptive block size image compression method and system Adaptive block size image compression method and system

H - Electricity

04

N

H04N 7/12 (2006.01) G06T 9/40 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01)

Patent

CA 2110264

An adaptive block size image compression method and system for compressing image data, a respective method and sys- tem for further compressing the image data for transmission. Each block and corresponding sub-blocks of pixel data is subjected to a discrete cosine transform (DCT) operation (10a-10d). Varying levels of sub-blocks of resulting corresponding transform coef ficients (12a-12d) are selected for construction into a composite transform coefficient block (QC) corresponding to each input block of pixel data. The selection of transform coefficient block size for the composite block is determined by a comparison pro- cess (20, 26, 32) between transform block and sub-block coding efficiency. The composite block is variable length coded to further reduce bit count in the compressed data. A discrete quadtree transform (DQT) operation is in supplement of the adaptive block size block selection with coefficient replacement to optimize image data compression.

Affiliated with

Also associated with

Rating

Adaptive block size image compression method and system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive block size image compression method and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive block size image compression method and system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1823925