| Presentation | 2009/1/5 ABSOLUTE ESTIMATION METHOD OF MOSQUITO NOISE FOR A POST FILTERLING(International Workshop on Advanced Image Technology 2009) Youhei Kashimura, Naoya Sagara, Kenji Sugiyama, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a DCT coding, degradations called block artifact and mosquito noise are appeared in reconstructed pictures. They should be reduced in post processing after decoding without superabundant processing. However, an estimation of mosquito noise is rare because of its difficulty. To realize an estimation of mosquito noise level, we extract a block that mosquito noise will be easy to occur. Mosquito noise level is calculated at a selected side of the block. In this processing, only the sides of high probability block are used. Then, a block value is taken by averaging. Finally, the picture value is calculated by averaging of this. Estimation method is evaluated by using the MPEG-4 decoded pictures. Quantization scale of coding and the estimated mosquito noise level are compared. As the results, we recognize the proposed method gives almost reasonable mosquito block and absolute level. Father, adaptive filter is controlled by the estimated mosquito noise level. It is recognized that the high quality of decoded picture is kept and the mosquito noise is reduced effectively at the picture with degradation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mosquito noise / Objective picture quality / Post filtering |
| Paper # | IE2008-198 |
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| Conference Information | |
| Committee | IE |
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| Conference Date | 2009/1/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Image Engineering (IE) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | ABSOLUTE ESTIMATION METHOD OF MOSQUITO NOISE FOR A POST FILTERLING(International Workshop on Advanced Image Technology 2009) |
| Sub Title (in English) | |
| Keyword(1) | Mosquito noise |
| Keyword(2) | Objective picture quality |
| Keyword(3) | Post filtering |
| 1st Author's Name | Youhei Kashimura |
| 1st Author's Affiliation | Graduate School of Engineering Seikei University() |
| 2nd Author's Name | Naoya Sagara |
| 2nd Author's Affiliation | Graduate School of Engineering Seikei University |
| 3rd Author's Name | Kenji Sugiyama |
| 3rd Author's Affiliation | Graduate School of Engineering Seikei University |
| Date | 2009/1/5 |
| Paper # | IE2008-198 |
| Volume (vol) | vol.108 |
| Number (no) | 373 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |