Abstract: This paper presents YCoCg and substraction mixing transform to eliminate spectral redundancy,while 2D-CDF（2,2）DWT is used to eliminate spatial redundancy.This transform has priority in hardware realization convenience,since it can be fully implemented by add and shift operation.Here improved EBCOT algorithm is used to finish compression coding.The experiment results show that in lossless image compression applications the method is much better than JPEG-LS,WinZip,ARJ,DPCM,the research result of a research team of Chinese Academy of Sciences,NMST and MST.Using Canal test images of JPL laboratory as a example data set,on the average the compression ratio using this algorithm increases about 41%,36%,34%,29%,16%,14%,11% respectively comparing to the above algorithms.

Key words: YCoCg and substraction mixing transform, redundancy, improved EBCOT algorithm

摘要： 提出了YCoCg和减影混合变换去除谱间冗余、2D-CDF（2,2）DWT去除空间冗余,该变换可完全由加法和移位完成便于硬件实现,改进的EBCOT算法进行编码。实验结果表明,无损压缩性能远好于JPEG-LS、WinZip、ARJ、DPCM、中国科学院一小组、NMST、MST的结果,以JPL的Canal测试图像为例,平均而言无损压缩比分别比上述算法提高了41%、36%、34%、29%、16%、14%、11%左右。

关键词: YCoCg和减影混合变换, 冗余, 改进的EBCOT算法