Blocking artifact reduction in JPEG-coded images
Byung-Jo Chae, Chae-Bong Sohn, Min Byoung-Ki, Seoung‐Jun Oh · 1999
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.