retinex


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retinex 

A theory proposed to explain colour and brightness perception and constancies. It postulates that the colour of an object is not determined by the spectral composition of the light stimulus coming from an object, but is determined by information obtained from a comparison of three lightnesses generated by the light absorption of the three types of cone cell. The name of the theory 'retinex' reflects the fact that the perception of the image results from the retina and the cortex. See pigment visual.
References in periodicals archive ?
Woodell, "Multiscale Retinex for Color Image Enhancement," Image Processing, vol.
Morel, "Multiscale Retinex," Image Processing On Line, vol.
An energy functional was proposed for Retinex as follows:
Park, "Intensity variation normalization for finger vein recognition using guided filter based singe scale retinex," Sensors (Switzerland), vol.
Xu et al., "Enhancement of infrared image based on the retinex theory," in Proceedings of the 29th Annual International Conference of the IEEE Engineering in Medicine Biology Society, pp.
The image S(x, y) is composed of two images: the illumination L(x, y) and reflectance R(x, y) images, then we can separate R(x, y) from L(x, y) in order to generating Retinex effect, the problem is known to be ill-posed mathematically.
KEYWORDS: Retinex, Histogram, Image enhancements, Autolevels, Luminance
(1977), "The Retinex Theory of Color Vision," Scientific American, vol.
Lam, "Combining gray world and retinex theory for automatic white balance in digital photography," in Proceedings of the Ninth International Symposium on Consumer Electronics, 2005.
From another aspect, patch is successfully used in the field of image processing recently, not only face recognition [14-16] but also image denoising [17-19], image superresolution [20,21], and image decomposition (cartoon-texture [22,23] or illumination-reflectance [24] and further retinex image enhancement [25]).
Cai, "Improved single image dehazing using dark channel prior and multi-scale retinex," in Proceedings of the International Conference on Intelligent System Design and Engineering Application (ISDEA '10), vol.
In recent years, the Retinex theory is widely used in the medical image processing [7].