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Hokkaido University Collection of Scholarly and Academic Papers >
Hokkaido University Sustainability Weeks >
Sustainability Weeks 2009 >
2009 APSIPA Annual Summit and Conference >
Efficient Color Image Compression with Category-Based Entropy Coder
| Title: | Efficient Color Image Compression with Category-Based Entropy Coder |
| Authors: | Lee, Kenneth K. C. Browse this author | | Chan, Y. K. Browse this author |
| Issue Date: | 4-Oct-2009 |
| Publisher: | Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference, International Organizing Committee |
| Journal Title: | Proceedings : APSIPA ASC 2009 : Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference |
| Start Page: | 747 |
| End Page: | 754 |
| Abstract: | Images nowadays are generally multi-channeled in nature. Apart from the luminance component, there are extra channels representing information like chrominance and transparency. Despite the fact that single-channel (grayscale) compressors could be applied directly to multi-channel sources, the performance is usually sub-optimal, owing to the distinctive numeric range and statistical distribution of data. If a scheme codes everything indiscriminately, it may end up allocating too many or too few bits to chrominance, resulting in unnecessarily large file size or artifacts like color-bleeding. This paper describes an efficient image compression scheme which works well for both single-channeled and multi-channeled images. The scheme first decorrelates images with directional and intra-image decorrealtors and the transformed coefficients are compressed. The proposed scheme makes use of a unified, category-based entropy coder, which adapts well to the statistical distribution of coefficients in different regions and channels. Experiment results show that the scheme outperforms the state-of-the-art JPEG2000 compressor by about 18%, together with a more pleasant perceptual quality. |
| Description: | APSIPA ASC 2009: Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference. 4-7 October 2009. Sapporo, Japan. Oral session: Low-level Color Image Processing (7 October 2009). |
| Conference Name: | APSIPA ASC 2009: Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference | | 2009年アジア太平洋信号情報処理連合学会アニュアルサミット・国際会議 |
| Conference Place: | Sapporo |
| Type: | proceedings |
| URI: | http://hdl.handle.net/2115/39800 |
| Appears in Collections: | 北海道大学サステナビリティ・ウィーク2009 (Sustainability Weeks 2009) > 2009年アジア太平洋信号情報処理連合学会アニュアルサミット・国際会議 (2009 APSIPA Annual Summit and Conference)
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