Results 31 to 40 of about 3,246 (209)

Lightness and Retinex Theory [PDF]

open access: yesJournal of the Optical Society of America, 1971
Sensations of color show a strong correlation with reflectance, even though the amount of visible light reaching the eye depends on the product of reflectance and illumination. The visual system must achieve this remarkable result by a scheme that does not measure flux. Such a scheme is described as the basis of retinex theory. This theory assumes that
E H, Land, J J, McCann
openaire   +2 more sources

Retinex in Matlab

open access: yesColor and Imaging Conference, 2000
Many different descriptions of Retinex methods of lightness computation exist. We provide concise MATLAB™ implementations of two of the spatial techniques of making pixel comparisons. The code is presented, along with test results on several images and a discussion of the results.
Brian V. Funt   +2 more
openaire   +2 more sources

Retinex-Based Relighting for Night Photography

open access: yesApplied Sciences, 2023
The lighting up of buildings is one form of entertainment that makes a city more colorful, and photographers sometimes change this lighting using photo-editing applications.
Sou Oishi, Norishige Fukushima
doaj   +1 more source

Retinex Low-Illumination Image Enhancement Algorithm Based on Light Image Estimation [PDF]

open access: yesJisuanji gongcheng, 2021
The images collected in low-illumination environment are limited in the contrast, and suffer from detail loss and noise interference.To address the problem, a Retinex-based method is proposed to improve illumination map estimation and realize low ...
HAN Mengyan, LI Liangrong, JIANG Kai
doaj   +1 more source

Retinex Poisson Equation: a Model for Color Perception

open access: yesImage Processing On Line, 2011
In 1964 Edwin H. Land formulated the Retinex theory, the first attempt to simulate and explain how the human visual system perceives color. Unfortunately, the Retinex Land-McCann original algorithm is both complex and not fully specified.
Nicola Limare   +3 more
doaj   +1 more source

Retinex Based Image Enhancement via General Dictionary Convolutional Sparse Coding

open access: yesApplied Sciences, 2020
Retinex theory represents the human visual system by showing the relative reflectance of an object under various illumination conditions. A feature of this human visual system is color constancy, and the Retinex theory is designed in consideration of ...
Jongsu Yoon, Yoonsik Choe
doaj   +1 more source

Retinex Filtering of Underwater Images [PDF]

open access: yes, 2020
This is the third work of a series which is discussing the applications that a Retinex filter can have for enhancing images. In the first paper, we considered the images from microscopes. In the second, we discussed how a Retinex filtering can help us in
Sparavigna, Amelia Carolina   +1 more
core   +1 more source

Research on Improved Retinex-Based Image Enhancement Method for Mine Monitoring

open access: yesApplied Sciences, 2023
An improved Retinex fusion image enhancement algorithm is proposed for the traditional image denoising methods and problems of halo enlargement and image overexposure after image enhancement caused by the existing Retinex algorithm.
Feng Tian, Tingting Chen, Jing Zhang
doaj   +1 more source

Retinex Image Enhancement Algorithm Based on Rotational Symmetric Bilateral Filtering [PDF]

open access: yesJisuanji gongcheng, 2016
Aiming at the shortage that single scale Retinex algorithm has the halo phenomenon,noise amplification phenomenon and image graying,based on rotational symmetric bilateral filtering,this paper proposes a Retinex image enhancement algorithm.The ...
CHANG Jian,BAI Jiahong
doaj   +1 more source

Level set method with Retinex‐corrected saliency embedded for image segmentation

open access: yesIET Image Processing, 2021
It can be a very challenging task when using level set method segmenting natural images with high intensity inhomogeneity and complex background scenes.
Dongmei Liu   +3 more
doaj   +1 more source

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