Lossless Compression Method for Ordered Dither Halftone
有序抖动半调图像的无损压缩算法

With the different influences of the threshold matrix on ordered dither,a preprocessor procedure was designed which was consisted by sub-blocks and xor calculation and could created long runs.Based on the theory of the Run-length and the Huffman coding,a new lossless compression algorithm was proposed.The experimental results show that the new method can get higher compression rate.