An efficient POCS-based post-processing technique using wavelet transform in HDTV
| Autor: | Yoon Kim, Hyo-Kak Kim, Goo-Rak Kwon, Sung-Jea Ko |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Smoothness
High-definition television business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Wavelet transform Blocking (statistics) Projection (linear algebra) Image (mathematics) Set (abstract data type) Media Technology Computer vision Artificial intelligence Electrical and Electronic Engineering business Transform coding Mathematics |
| Zdroj: | IEEE Transactions on Consumer Electronics. 51:1283-1290 |
| ISSN: | 0098-3063 |
| DOI: | 10.1109/tce.2005.1561857 |
| Popis: | In this paper, we propose a new post-processing method, based on the theory of the projection onto convex sets (POCS) to reduce the in digital high definition television (HDTV) 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 exhibit the PSNR improvement in the output image. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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