Detecting and removing specularities in facial images
Computer Vision and Image Understanding
Detecting and removing specularities in facial images
Computer Vision and Image Understanding
Illuminated facial preprocessing with wavelet local binary patterns histogram specification
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Wavelet local binary patterns fusion as illuminated facial image preprocessing for face verification
Expert Systems with Applications: An International Journal
HDR image quality enhancement based on spatially variant retinal response
Journal on Image and Video Processing - Special issue on emerging methods for color image and video quality enhancement
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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 specific design issues and their effects on the properties of the retinex operation. Here we describe the signal processing design of the retinex. We find that the placement of the logarithmic function is important and produces the best results when placed after the surround formation. We also find that best rendition is obtained for a "canonical" gain-offset applied after the retinex operation.