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Image color constancy method under multi-light-source environment

A technology with constant color and multiple light sources, which is applied in the field of computer vision and image processing to achieve fast speed, simple calculation and good effect

Active Publication Date: 2016-12-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to solve the defects in the existing image scene multi-light source color estimation method, and propose a method for image color constant in a multi-light source environment

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  • Image color constancy method under multi-light-source environment
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  • Image color constancy method under multi-light-source environment

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Embodiment Construction

[0027] In view of the fact that human vision itself has the ability of color constancy, it can automatically correct the color shift in the scene, the retina has the ability to adapt to light and dark, and the characteristics of the retinal neuron receptive field, based on this, the present invention proposes a multi-light source based on the physiological mechanism of the retina Color const method. This method simulates the light-dark adaptation ability of vision and the characteristics of retinal neuron receptive fields, and establishes a model based on ON-type and OFF-type receptive fields based on the division of bright and dark areas. This model can well estimate the position and Color, and parameters can be adjusted to adapt to different scene images.

[0028] The following is a specific description through an embodiment.

[0029] Download an image (8D5U5535.png) and its corresponding real light source color from the currently internationally recognized image library we...

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Abstract

The invention discloses an image color constancy method under a multi-light-source environment. The invention puts forward a multi-light-source color constancy method based on a retina physiological mechanism, simulates the light and dark adaption capability of vision and the characteristics of a retinal neuron reception field, and establishes a model based on ON type and OFF type reception fields on the basis of light and dark area division, the model can favorably estimate the position and the color of a light source, and parameters can be regulated to adapt to different scene images. The method has the characteristics of few parameters, simpleness in calculation, high speed, good effect and the like, can carry out real-time processing, and is very suitable to be built in the preprocessing front end of physical equipment to estimate a scene light source color in the image.

Description

technical field [0001] The invention belongs to the technical field of computer vision and image processing, and in particular relates to scene multi-light source color estimation and image color correction technology of color images. Background technique [0002] In the natural environment, the human visual system has the ability to resist the color change of the light source in the scene. For example, for the same scene, whether it is illuminated by yellowish sunlight in the morning or reddish sunlight in the evening, the color of the scene perceived by our visual system remains constant. This ability is also called Color constancy of the visual system. Limited by technical conditions, the pictures taken by current imaging devices such as cameras often have different degrees of color shift due to the influence of the color of the light source in the scene. This color shift caused by the color of the light source in the scene will make the subsequent computer vision Appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/40
Inventor 李永杰任燕泽张明高绍兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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