Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2005.11a
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- Pages.427-430
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- 2005
Post-processing Technique Based on POCS Using EZW
EZW를 이용한 POCS 기반의 후처리 기법
- Kim, Hyo-Kak (Department of Electronics and Computer Engineering, Korea University) ;
- Kwon, Goo-Rak (Department of Electronics and Computer Engineering, Korea University) ;
- Kim, Yoon (Department of Electrical and Computer Engineering, Kangwon National University) ;
- Ko, Sung-Jea (Department of Electronics and Computer Engineering, Korea University)
- Published : 2005.11.26
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 new 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