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Shrivastava, Jaya
- Retinex Theory for Image Enhancement
Authors
1 Rungta College of Engineering and Technology, Bhilai. Chhattisgarh, IN
Source
Research Journal of Engineering and Technology, Vol 1, No 2 (2010), Pagination: 55-57Abstract
Recorded color images differ from direct human viewing by the lack of dynamic range compression and color constancy. Research is summarized which develops the center/surround retinex concept originated by Edwin Land through a single scale design (SSR) to a multi-scale design with color restoration (MSRCR). The MSRCR synthesizes dynamic range compression, color constancy, and color rendition and, thereby, approaches fidelity to direct observation.
A computation for color images that approaches fidelity to scene observation must combine dynamic range compression, color consistency-a computational analog for human vision color constancy-and color and lightness tonal rendition. We refer to the computational analog to human vision color constancy as color consistency. When the dynamic range of a scene exceeds the dynamic range of the recording medium, there is an irrevocable loss of visual information at the extremes of the scene dynamic range.