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My ICIP 2006 Schedule
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Paper Detail
| Paper: | MP-P6.4 |
| Session: | Color and Multispectral Processing |
| Time: | Monday, October 9, 14:20 - 17:00 |
| Presentation: |
Poster |
| Topic: |
Color and Multispectral Processing: Color processing |
| Title: |
VARIATIONAL RETINEX ALGORITHM WITH ITS APPLICATION TO A HIGH-QUALITY CHROMA KEY |
| Authors: |
Hiromi Takahashi; Kanagawa University | | | | | Takahiro Saito; Kanagawa University | | | | | Takashi Komatsu; Kanagawa University | | |
| Abstract: |
The Retinex theory deals with separation of irradiance and reflectance from an image. Recently, Kimmel and others proposed a variational framework that unifies the previous Poisson-equation-type Retinex algorithms developed by Horn and others, and presented a separation algorithm with the time-evolution of a linear diffusion process. However, this separation algorithm cannot achieve physically rational separation, if true irradiance varies among color channels. To cope with this problem, we introduce a nonlinear diffusion process into the time-evolution. Moreover, we introduce an approach to treat all color channels collectively. Furthermore, we apply our separation algorithm to a high quality chroma key where a color of each pixel in the foreground frame are adaptively corrected through transformation of the separated irradiance. |
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