Title :
Blocking artifact reduction in JPEG-coded images
Author :
Byung-Jo Chae ; Chae-Bong Sohn ; Min Byoung-Ki ; Seoung-Jun Oh
Author_Institution :
Dept. of Electron., Kwangwoon Univ., Seoul, South Korea
Abstract :
We proposed the post-processing method to reduce the blocking artifact in low-bit-rate coded JPEG images, which is based on minimum block-boundary-discontinuity criterion. We analyzed the statistical property of block boundary pixel difference, classified all blocks into one of two types using OSLD (overlapped sub-laplacian distribution), and compensated the quantization error depending on the type of block, adaptively. Our postprocessing method can provide better visual quality as well as PSNR than any other method.
Keywords :
discrete cosine transforms; image coding; vector quantisation; JPEG-coded images; block boundary pixel difference; blocking artifact reduction; low-bit-rate coded JPEG images; minimum block-boundary-discontinuity criterion; overlapped sub-laplacian distribution; post-processing method; postprocessing method; quantization error; statistical property; visual quality; Current measurement; Decoding; Discrete cosine transforms; Frequency estimation; Laplace equations; PSNR; Pixel; Quantization; Transform coding; Video compression;
Conference_Titel :
Image Processing, 1999. ICIP 99. Proceedings. 1999 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-7803-5467-2
DOI :
10.1109/ICIP.1999.823027
