Blocking effect reduction of JPEG images by signal adaptive filtering

被引:109
作者
Lee, YL [1 ]
Kim, HC [1 ]
Park, HW [1 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Informat & Commun Engn, Seoul 130012, South Korea
关键词
blocking effect; JPEG; postprocessing; signal adaptive filter;
D O I
10.1109/83.661000
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
A postprocessing algorithm is proposed to reduce the blocking artifacts of Joint Photographic Experts Group (JPEG) decompressed images. The reconstructed images from JPEG compression produce noticeable image degradation near the block boundaries, in particular for highly compressed images, because each block is transformed and quantized independently. The blocking effects are classified into three types of noises in this paper: grid noise, staircase noise, and corner outlier. The proposed postprocessing algorithm, which consists of three stages, reduces these blocking artifacts efficiently. A comparison study between the proposed algorithm and other postprocessing algorithms is made by computer simulation with several JPEG images.
引用
收藏
页码:229 / 234
页数:6
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