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Post-processing Technique Based on POCS Using Wavelet Transform  

Kwon Goo-Rak (School of Electrical Engineering, Korea University)
Kim Hyo-Kak (School of Electrical Engineering, Korea University)
Kim Yoon (Dept. of Electrical and Computer Engineering, Kangwon National University)
Ko Sung-Jea (School of Electrical Engineering, Korea University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.43, no.3, 2006 , pp. 1-8 More about this Journal
Abstract
In this paper, we propose a new post-processing method, based on the theory of the projection onto convex sets (POCS) to reduce the blocking artifacts in decoded images. We propose a few smoothness constraint set (SCS) and its projection operator in the wavelet transform (WT) domain to remove unnecessary high-frequency components caused by blocking artifacts. We also propose a new method to find and preserve the original high frequency components of the image edge. Experimental results show that the proposed method can not only achieve a significantly enhanced subjective quality, but also have the PSNR improvement in the output image.
Keywords
SCS; QCS;
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