| Presentation | 2012-03-08 Quality Improvement of JPEG Images by Re-application of JPEG and Image Database Katsuya KOHNO, Akira TANAKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Image compression is one of important technologies in the fields of image processing in terms of efficient transmission and storing of images. Since there exist efficient image compression methods today, we can compress a given image by those methods efficiently. However, many existing compressed images were compressed by the conventional JPEG. Thus, we need a technique for improving the quality of JPEG images especially with low bit-rates. Many methods for improving the quality of JPEG images have been proposed. Among them, a method based on re-application of JPEG is recognized as one of efficient methods. The key idea of this method is adopting a weighted sum of images constructed by re-application of JPEG, which means compression and decoding, to various shifted version of a given JPEG image. In this paper, we propose a method for constructing a better weights for the weighted sum of images in order to improve the performance of the method based on re-application of JPEG, incorporating a image database and novel distance measures between two images. We also show some results of numerical examples in order to verify the efficacy of the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | JPEG / image quality improvement / re-application of JPEG / image database |
| Paper # | CAS2011-109,SIP2011-129,CS2011-101 |
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| Committee | CAS |
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| Conference Date | 2012/3/1(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Circuits and Systems (CAS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Quality Improvement of JPEG Images by Re-application of JPEG and Image Database |
| Sub Title (in English) | |
| Keyword(1) | JPEG |
| Keyword(2) | image quality improvement |
| Keyword(3) | re-application of JPEG |
| Keyword(4) | image database |
| 1st Author's Name | Katsuya KOHNO |
| 1st Author's Affiliation | Computer Science Course, Department of Electronics and Information Engineering, School of Engineering, Hokkaido University() |
| 2nd Author's Name | Akira TANAKA |
| 2nd Author's Affiliation | Division of Computer Science, Graduate School of Information Science and Technology, Hokkaido University |
| Date | 2012-03-08 |
| Paper # | CAS2011-109,SIP2011-129,CS2011-101 |
| Volume (vol) | vol.111 |
| Number (no) | 465 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |