Blockiness reduction in JPEG coded images

Author

Triantaffilidis, G.A. ; Sampson, D. ; Tzovaras, D. ; Strintzis, M.G.

Author_Institution

Informatics & Telematics Inst., Thessaloniki, Greece

Volume

2

fYear

2002

fDate

2002

Firstpage

1325

Abstract

A novel technique is proposed to reduce the blocking artifacts detected in the JPEG coded images, especially in low bit rates. The proposed algorithm is consisting of two stages: firstly, the AC coefficients are estimated based on their observed probability distribution and secondly, a postprocessing scheme consisting of a region classification algorithm and a spatial adaptive filtering is applied for blockiness removal. Experimental results illustrating the performance of the proposed method are presented and evaluated using the mean squared difference of slope (MSDS) metric.

Keywords

adaptive filters; discrete cosine transforms; filtering theory; image classification; image coding; probability; spatial filters; transform coding; AC coefficients estimation; DCT coefficient restoration; JPEG coded images; MSDS metric; blockiness removal; blocking artifacts reduction; mean squared difference of slope metric; postprocessing scheme; probability distribution; region classification algorithm; spatial adaptive filtering; Adaptive filters; Classification algorithms; Discrete cosine transforms; Filtering algorithms; Frequency; Image coding; Image reconstruction; Image restoration; Pixel; Probability distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Signal Processing, 2002. DSP 2002. 2002 14th International Conference on

Print_ISBN

0-7803-7503-3

Type

conf

DOI

10.1109/ICDSP.2002.1028338

Filename

1028338