Image Enhancement with Attenuated Blocking Artifact in Transform Domain

Sung Kon OH  Jeong Hyun YOON  Yong Man RO  

IEICE TRANSACTIONS on Information and Systems   Vol.E85-D   No.1   pp.291-297
Publication Date: 2002/01/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Image Processing, Image Pattern Recognition
image enhancement,  blocking artifact,  compressed domain,  filtering,  DCT,  

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Image processing in transform domain has many advantages but it could be suffered from local effects such as a blocking artifact. In this paper, an image processing is performed by weighting coefficients in the compressed domain, i.e., filtering coefficients are appropriately selected according to the processing. Since we find the appropriate factors according to global image enhancement, blocking artifacts are reduced between inter-blocks. Experimental results show that the proposed technique has the advantages of simple computation and easy implementation.