Properties of a Center / Surround Retinexpart One : Signal Processing
نویسنده
چکیده
The last version of Edwin Land's retinex model for human vision's lightness and color constancy has been implemented. Previous research has established the mathematical foundations of Land's retinex but has not examined speciic design issues and their eeects on the properties of the retinex operation. Here we describe the signal processing design of the retinex. We nd that the placement of the logarithmic function is important and produces best results when placed after the surround formation. We also nd that best rendition is obtained for a \canonical" gain-ooset applied after the retinex operation.
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