Title :
A hybrid algorithm for the removal of blocking artifacts
Author :
Triantafyllidis, G.A. ; Tzovaras, D. ; Sampson, D. ; Strintzis, M.G.
Author_Institution :
Informatics & Telematics Inst., Thessaloniki, Greece
Abstract :
A novel hybrid frequency and spatial domain method is presented for blockiness reduction in low bit rate compressed images. The proposed method consists of two stages acting complementarily. In the first, better estimates of the reconstructed DCT coefficients are obtained based on their observed probability distribution. In the second, an efficient postprocessing scheme, consisting of a region classification algorithm and spatial adaptive filtering, is applied. Experimental results illustrating the performance of the proposed method are presented and evaluated.
Keywords :
adaptive filters; data compression; discrete cosine transforms; frequency-domain analysis; image classification; image coding; image reconstruction; parameter estimation; spatial filters; statistical analysis; transform coding; DCT coefficients; adaptive filtering; blockiness reduction; blocking artifacts removal; compressed images; discrete cosine transform; frequency domain; hybrid algorithm; probability distribution; reconstructed image; region classification; spatial domain; spatial filtering; Adaptive filters; Bit rate; Decoding; Discrete cosine transforms; Filtering algorithms; Frequency; Image reconstruction; Informatics; Laplace equations; Probability distribution;
Conference_Titel :
Multimedia and Expo, 2002. ICME '02. Proceedings. 2002 IEEE International Conference on
Print_ISBN :
0-7803-7304-9
DOI :
10.1109/ICME.2002.1035743
