An efficient algorithm for the enhancement of JPEG-coded images

被引：7

作者：

Triantafyllidis, GA ^{[1
]}

Varnuska, M

Sampson, D

Tzovaras, D

Strintzis, MG

机构：

[1] Aristotle Univ Thessaloniki, Dept Elect & Comp Engn, Informat Proc Lab, Thessaloniki 54124, Greece

[2] Univ W Bohemia, Dept Comp Sci, Plzen 30614, Czech Republic

[3] Informat & Telemat Inst, Thermi 57001, Greece

来源：

COMPUTERS & GRAPHICS-UK | 2003年 / 27卷 / 04期

关键词：

blocking artifact reduction; DCT coefficient adjustment; spatial adaptive filtering; MSDS;

D O I：

10.1016/S0097-8493(03)00088-8

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

Despite its growing age, the JPEG is among the most popular choices as a standard compression scheme for continuous-tone still images. In this paper, a novel technique is proposed to alleviate the blocking artifacts that usually occur in JPEG coded images especially at low bit rates. The proposed algorithm consists of two stages: firstly, the AC coefficients are estimated based on their observed probability distribution and secondly, a postprocessing scheme is applied for blockiness removal, consisting of a region classification algorithm and a spatial adaptive filtering. Experimental results demonstrate the efficiency of the proposed method. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：529 / 534

页数：6

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