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

Volume

2

fYear

1999

Firstpage

894

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 1999. ICIP 99. Proceedings. 1999 International Conference on

Conference_Location

Kobe

Print_ISBN

0-7803-5467-2

Type

conf

DOI

10.1109/ICIP.1999.823027

Filename

823027