Results 81 to 90 of about 2,348 (159)

Experiments on the White Patch Retinex in RGB and CIELAB color spaces

Acta Universitaria, 2012
La constancia de color es un proceso importante en una variedad de tareas de visión. La mayoría de los dispositivos para la captura de imágenes operan en el espacio de color RGB y, por lo general, el procesamiento de las imágenes es en este espacio ...
Jonathan Cepeda-Negrete, Raul E. Sanchez-Yanez   +1 more
doaj  

A Novel Low-Illumination Image Enhancement Method Based on Convolutional Neural Network with Retinex Theory

Applied Sciences
Low-illumination images can seriously affect or even limit the performance of the human eye or a computer vision system, making image enhancement processing necessary.
Haixia Mao, Wei Peng, Yan Tian, Xiaochun Zhu   +3 more
doaj   +1 more source

Illumination compensation for face image using retinex method based on bilateral filtering

, 2010
Illumination variation is one of the critical factors affecting face recognition rate. In the paper, we propose a novel Retinex method based on bilateral filtering to compensate the illumination for face image.
Yang DW(杨大为), Tang YD(唐延东)
core  

Shadow Detection and Removal from Solo Natural Image Based on Retinex Theory

, 2008
Shadows are physical phenomena observed in most natural scenes. They can cause many problems in computer vision performance. The paper addresses the problem of shadow detection and removal from solo image of natural scenes. Our method is based on Retinex
Du YK(杜英魁), Sun J(孙静), Tang YD(唐延东)   +2 more
core  

Multi-channel low-light image enhancement method based on global robust Retinex model

Shenzhen Daxue xuebao. Ligong ban
In response to the issues where existing illumination enhancement methods ignore the changes in hue and saturation under different lighting conditions, resulting in the loss of excessive detail information while suppressing noise, we propose a global ...
WU Hanning, YI Jizheng, LI Xiaoyao, LI Sijia   +3 more
doaj   +1 more source

A nighttime image enhancement method based on Retinex and guided filter for object recognition of apple harvesting robot

International Journal of Advanced Robotic Systems, 2018
In order to improve the working efficiency of robot promptly picking ripe apples, the harvesting robot must have the ability of continuous recognition and operation at night. Nighttime apple image has many dark spaces and shadows with low resolution, and
Ji Wei, Qian Zhijie, Xu Bo, Zhao Dean
doaj   +1 more source

Retinex theory-based shadow detection and removal in single outdoor image

, 2009
Shadows, the common phenomena in most outdoor scenes, bring many problems in practical image processing. Shadow detection and removal, especial in uncalibrated outdoor image, is still a difficult problem.
Tian JD(田建东), Du YK(杜英魁), Sun J(孙静), Tang YD(唐延东)   +3 more
core  

Color transfer and Retinex theory based illumination invariance

, 2007
The paper proposes a novel algorithm based on Retinex theory and color transfer to get illumination invariance among images, taking one of the images as a reference.
Sun J(孙静), Tang YD(唐延东)
core  

Point-based Spatial Color Sampling in Milano-Retinex : a Survey

, 2018
Milano-Retinex is a family of Retinex-inspired spatial colour algorithms mainly developed for colour image enhancement. According to the Retinex theory, a Milano-Retinex algorithm takes as input an RGB image and processes the colour intensities of each ...
Michela Lecca, Alessandro Rizzi, A. Rizzi, Simone, Gabriele, Lecca, Michela, Bonanomi, Cristian, Gabriele Simone, Cristian Bonanomi, C. Bonanomi, M. Lecca, Rizzi, Alessandro, G. Simone   +11 more
core   +1 more source

Retinex Jointed Multiscale CLAHE Model for HDR Image Tone Compression

Mathematics
Tone-mapping algorithms aim to compress a wide dynamic range image into a narrower dynamic range image suitable for display on imaging devices. A representative tone-mapping algorithm, Retinex theory, reflects color constancy based on the human visual ...
Yu-Joong Kim, Dong-Min Son, Sung-Hak Lee
doaj   +1 more source