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Selective deblocking method using a transform table of different dimension DCT
- Authors
- Lim, Taehwan; Ryu, Jiman; Jeong, Jechang
- Issue Date
- Feb-2009
- Publisher
- Vaclav Skala - UNION Agency
- Keywords
- Blocking artifacts; DCT domain; Post-processing; Transform table
- Citation
- 17th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, WSCG'2009 - In Co-operation with EUROGRAPHICS, Full Papers Proceedings, pp.41 - 48
- Indexed
- SCOPUS
- Journal Title
- 17th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, WSCG'2009 - In Co-operation with EUROGRAPHICS, Full Papers Proceedings
- Start Page
- 41
- End Page
- 48
- Abstract
- In this paper, we propose a selective deblocking algorithm that reduces block discontinuities in DCT domain. Our algorithm applies a deblocking procedure to each line of adjacent 3 blocks, so the block is divided into several line vectors. There are three Low Pass filters that are applied differently to 1×24 DCT values according to each condition of adjacent 3 vectors for conserving image details, and we use a transform table between different dimension DCTs (1×8 and 1×24 DCT) for reducing a computational cost. The experimental results show that the proposed algorithm makes good results on an improvement of subjective image quality and a computational efficiency.
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