有序抖动半调图像的无损压缩算法  

Lossless Compression Method for Ordered Dither Halftone

作　　者：孔月萍[1] 耿烨[1] 

机构地区：[1]两安建筑科技大学信息与控制工程学院,西安710055

出　　处：《光子学报》2009年第5期1306-1308,共3页Acta Photonica Sinica

基　　金：陕西省自然科学基金(2004F32);陕西省教育厅专项科研计划(04JK244)资助

摘　　要：在分析不同有序抖动模板对所生成抖动半调图像的影响因素基础上,设计了尺度变化的分块及块间异或预处理策略,大大提高了二值游程长度.进而使用游程和哈夫曼相结合的编码思想提出了一种新的有序抖动半调图像无损压缩算法.仿真实验表明,该算法在编码效率上具有较大优势.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.

关 键 词：有序抖动半调 阈值模板 无损压缩 

分 类 号：TN919.81[电子电信—通信与信息系统] TN911.73[电子电信—信息与通信工程]