Improved Coding Algorithm Based on JPEG2000
Zhang Chun-xiang · Information and Electronic Engineering · 2006
Through deeply studying the EBCOT block coding of JPEG2000,a coding feature that the three passes of block coding in each bit plane have different need-to-be-coded pixels is discovered.According to the coding feature and the analysis of the image transform coefficients,an improved algorithm encoding the highest and the second highest bit planes together and combining two coding passes on the 0 and 1bit plane is proposed.The improved algorithm based on the coding pass combination has some advantages as follows: on the one hand,it can speed up coding through reducing scanning times;on the other hand,the logical combination bit plane coding algorithm reduces the important coding of lesser pixels to the second highest bit plane and makes the lossless compression performance improvement be possible.