Artifact reduction in low bit rate DCT-based image compression

被引：62

作者：

Luo, JB

Chen, CW

Parker, KJ

Huang, TS

机构：

[1] UNIV ILLINOIS,BECKMAN INST,URBANA,IL 61801

[2] UNIV ILLINOIS,COORDINATED SCI LAB,URBANA,IL 61801

来源：

IEEE TRANSACTIONS ON IMAGE PROCESSING | 1996年 / 5卷 / 09期

关键词：

D O I：

10.1109/83.535848

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

This correspondence presents a scheme for artifact reduction of low bit rate discrete-cosine-transform-compressed (DCT-compressed) images. First, the DC coefficients are calibrated using gradient continuity constraints. Then, an improved Huber-Markov-random-field-based (HMRF-based) smoothing is applied. The constrained optimization is implemented by the iterative conditional mode (ICM). Final reconstructions of typical images with improvements in both visual quality and peak signal-to-noise ratio (PSNR) are also shown.

引用

页码：1363 / 1368

页数：6

共 12 条

[1] BESAG J, 1986, J R STAT SOC B, V48, P259
[2] Fan Z., 1994, P IS T SPIE S EL IM
[3] STOCHASTIC RELAXATION, GIBBS DISTRIBUTIONS, AND THE BAYESIAN RESTORATION OF IMAGES
GEMAN, S
GEMAN, D
[J]. IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, 1984, 6 (06) : 721 - 741
[4] THE LOT - TRANSFORM CODING WITHOUT BLOCKING EFFECTS
MALVAR, HS
STAELIN, DH
[J]. IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING, 1989, 37 (04): : 553 - 559
[5] Pennebaker W.B., 1993, JPEG STILL IMAGE DAT
[6] Rabbani M, 1991, DIGITAL IMAGE COMPRE
[7] RAMAMURTHI B, 1986, IEEE T ACOUST SPEECH, V34, P553
[8] Reeve H. C. III, 1983, Proceedings of ICASSP 83. IEEE International Conference on Acoustics, Speech and Signal Processing, P1212
[9] ROSENBERG K, 1992, IFIP TRANS C, V2, P91
[10] ENHANCEMENT OF LOW BIT-RATE CODED IMAGES USING EDGE-DETECTION AND ESTIMATION
SAUER, K
[J]. CVGIP-GRAPHICAL MODELS AND IMAGE PROCESSING, 1991, 53 (01): : 52 - 62

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