Lifting-based reversible color transformations for image compression

被引：42

作者：

Malvar, Henrique S. ^{[1
]}

Sullivan, Gary J. ^{[1
]}

Srinivasan, Sridhar ^{[1
]}

机构：

[1] Microsoft Corp, Redmond, WA 98052 USA

来源：

APPLICATIONS OF DIGITAL IMAGE PROCESSING XXXI | 2008年 / 7073卷

关键词：

Image coding; color transforms; lossless coding; YCoCg; JPEG; JPEG XR; HD Photo;

D O I：

10.1117/12.797091

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper reviews a set of color spaces that allow reversible mapping between red-green-blue and luma-chroma representations in integer arithmetic. The YCoCg transform and its reversible form YCoCg-R can improve coding gain by over 0.5 dB with respect to the popular YCrCb transform, while achieving much lower computational complexity. We also present extensions of the YCoCg transform for four-channel CMYK pixel data. Thanks to their reversibility under integer arithmetic, these transforms are useful for both lossy and lossless compression. Versions of these transforms are used in the HD Photo image coding technology (which is the basis for the upcoming JPEG XR standard) and in recent editions of the H.264/MPEG-4 AVC video coding standard.

引用

页数：10

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