Results 141 to 150 of about 1,383 (181)

Analyzing center/surround retinex

Information Sciences, 2020
Abstract The receptive fields in the Human Visual System (HVS) are organized in such a way that they not merely capture information on the photoreceptor’s exposition to light but also on the differences in firing rates of their center and surround cells.
Jose Luis Lisani, Jean-Michel Morel, Ana Belén Petro, Catalina Sbert   +3 more
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Acceleration of an improved Retinex algorithm

CVPR 2011 WORKSHOPS, 2011
Retinex is an image restoration method and the center/surround Retinex is appropriate for parallelization because it utilizes a convolution operation with large kernel size to achieve dynamic range compression and color/lightness rendition. However, its great capability for image enhancement comes with intensive computation.
Yuan-Kai Wang, Wen-Bin Huang
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The Goldfish as a Retinex Animal

Science, 1985
In an experiment designed to test color constancy in a situation comparable to that used in E. H. Land's experiments with human observers, goldfish were trained to approach a particular color within a richly colored but variable "Mondrian" background.
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Visual communication with retinex coding

Applied Optics, 2000
Visual communication with retinex coding seeks to suppress the spatial variation of the irradiance (e.g., shadows) across natural scenes and preserve only the spatial detail and the reflectance (or the lightness) of the surface itself. The separation of reflectance from irradiance begins with nonlinear retinex coding that sharply and clearly enhances ...
F O, Huck, C L, Fales, R E, Davis, R, Alter-Gartenberg   +3 more
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Retinex enhancement of infrared images

2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2008
With the ability of imaging the temperature distribution of body, infrared imaging is promising in diagnostication and prognostication of diseases. However the poor quality of the raw original infrared images prevented applications and one of the essential problems is the low contrast appearance of the imagined object.
Ying, Li, Renjie, He, Guizhi, Xu, Changzhi, Hou, Yunyan, Sun, Lei, Guo, Liyun, Rao, Weili, Yan   +7 more
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Recent Advances in Retinex Theory

Vision Research, 1985
It is a cultural commonplace deriving from Newton that the colour of an object we see in the world around us depends on the relative amounts of red light, green light, and blue light coming from that object to our eyes. For a very long time it has been known that the colour of the object when it is part of a general scene will not change markedly with ...
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Assessment of the Wiener–Retinex process

Applied Optics, 2002
We assess the performance of the Retinex transformation, the Wiener restoration, and the combined Wiener-Retinex process in the context of the end-to-end model of color visual-communication channels for near-surface acquisition. We extend the formulations of panchromatic imaging for the nonlinear Retinex transformation and the linear Wiener and Wiener ...
Rachel, Alter-Gartenberg, Scott R, Nolf, Richard E, Davis   +2 more
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Frankle-McCann Retinex by Shuffling

2012
In this paper, our aim is to present an alternative to the ratio-product term of Frankle-McCann Retinex by manipulating shifting directions and the number of iterations, which is a major obstacle in applications, keeping the quality of the result images.
Dong-Guk Hwang, Woo-Ram Lee, Young-Jin Oh, Byoung-Min Jun   +3 more
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On edge-aware path-based color spatial sampling for Retinex: from Termite Retinex to Light Energy-driven Termite Retinex

Journal of Electronic Imaging, 2017
Retinex theory estimates the human color sensation at any observed point by correcting its color based on the spatial arrangement of the colors in proximate regions. In this work, we revise two recent path-based, edge-aware Retinex implementations: Termite Retinex (TR) and Energy-driven Termite Retinex (ETR).
Simone, Gabriele, Cordone, Roberto, Serapioni, Raul Paolo, Lecca, Michela   +3 more
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A Variational Model with Barrier Functionals for Retinex

SIAM Journal on Imaging Sciences, 2015
Summary: This paper proposes a variational model with barriers for Retinex, borrowing the ideas of barrier methods. We first present an energy functional and then deduce a new energy functional from it by adding two barriers. The proposed model is defined as a constrained optimization problem associated with the deduced energy functional.
Wei Wang 0117, Chuanjiang He
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