| Presentation | 2011-06-10 An approach to halo suppression for Retinex-based image enhancement Satoshi YOSHIKAWA, Hiroshi TSUTSUI, Hiroyuki OKUHATA, Takao ONOYE, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In Retinex-based image enhancement schemes, an image is enhanced by removing an estimated illumination included in the input image. As for illumination estimation method, in this paper, we focus on the variational model which utilizes spatially smooth property of the illumination and formulates the illumination estimation problem as a quadratic programming optimization problem. In this method, the ordinary halo effect, which over-enhances bright regions adjacent with dark regions, does not occur. However, dark regions adjacent with bright regions remain as it was since they cannot be sufficiently enhanced. This effect is called a reverse halo effect in this paper. To suppress this effect, we propose a method to control the parameter in the cost function based on each pixel value and the amount of edge component. The experimental results show that the proposed method can suppress the reverse halo effect maintaining other features of the Retinex-based image enhancement. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Image enhancement / tone correction / luminosity compensation / Retinex theory / halo effect |
| Paper # | SIS2011-18 |
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| Conference Information | |
| Committee | SIS |
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| Conference Date | 2011/6/2(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Smart Info-Media Systems (SIS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An approach to halo suppression for Retinex-based image enhancement |
| Sub Title (in English) | |
| Keyword(1) | Image enhancement |
| Keyword(2) | tone correction |
| Keyword(3) | luminosity compensation |
| Keyword(4) | Retinex theory |
| Keyword(5) | halo effect |
| 1st Author's Name | Satoshi YOSHIKAWA |
| 1st Author's Affiliation | Dept. of Information Systems Engineering, Graduate School of Information Science and Technology, Osaka University() |
| 2nd Author's Name | Hiroshi TSUTSUI |
| 2nd Author's Affiliation | Dept. of Communications and Computer Engineering, Graduate School of Informatics, Kyoto University |
| 3rd Author's Name | Hiroyuki OKUHATA |
| 3rd Author's Affiliation | Synthesis Corporation |
| 4th Author's Name | Takao ONOYE |
| 4th Author's Affiliation | Dept. of Information Systems Engineering, Graduate School of Information Science and Technology, Osaka University |
| Date | 2011-06-10 |
| Paper # | SIS2011-18 |
| Volume (vol) | vol.111 |
| Number (no) | 78 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |