An efficient algorithm for optimizing DCT quantization

被引：28
|
作者：
Ratnakar, V [1 ]
Livny, M
机构：
[1] Epson Res & Dev, Palo Alto, CA 94304 USA
[2] Univ Wisconsin, Dept Comp Sci, Madison, WI 53706 USA
来源：
IEEE TRANSACTIONS ON IMAGE PROCESSING | 2000年 / 9卷 / 02期
关键词：
discrete cosine transform; JPEG; lossy image compression; quantization; rate control; rate-distortion tradeoff; thresholding;
D O I：
10.1109/83.821739
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
We describe the RD-OPT algorithm for DCT quantization optimization, which can be used as an efficient tool for near-optimal rate control in DCT-based compression techniques, such as JPEG and MPEG, RD-OPT measures DCT coefficient statistics for the given image data to construct rate/distortion-specific quantization tables with nearly optimal tradeoffs.
引用
收藏
页码：267 / 270
页数：4
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