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

页码：267 / 270

页数：4

共 14 条

[1] DISCRETE COSINE TRANSFORM [J].

AHMED, N ;

NATARAJAN, T ;

RAO, KR .

IEEE TRANSACTIONS ON COMPUTERS, 1974, C 23 (01) :90-93

[2]

AHUMADA AJ, 1992, P SPIE HUMAN VISION, V3

[3]

Crouse M., 1995, Proceedings. DCC '95 Data Compression Conference (Cat. No.95TH8037), P342, DOI 10.1109/DCC.1995.515524

[4] Joint thresholding and quantizer selection for transform image coding: Entropy-constrained analysis and applications to baseline JPEG [J].

Crouse, M ;

Ramchandran, K .

IEEE TRANSACTIONS ON IMAGE PROCESSING, 1997, 6 (02) :285-297

[5]

Graham R. L., 1972, Information Processing Letters, V1, P132, DOI 10.1016/0020-0190(72)90045-2

[6]

MONRO DM, 1993, P DAT COMPR C SNOWB, P188

[7]

PENNEBAKER WB, 1993, JPEG STILL IMAGE DAT

[8] Extending RD-OPT with global thresholding for JPEG optimization [J].

Ratnakar, V ;

Livny, M .

DCC '96 - DATA COMPRESSION CONFERENCE, PROCEEDINGS, 1996, :379-386

[9]

RATNAKAR V, 1995, P DAT COMPR C 95, P332

[10]

RATNAKAR V, 1995, P SPIE DIGITIAL VIDE

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