Low illumination image color preserving enhancement method based on improved Retinex

A low-illumination, image-based technology, applied in the field of image processing, can solve problems such as high time cost, color distortion, and blurred details, and achieve good robustness, prevent over-enhancement, and enhance color effects

Active Publication Date: 2017-12-29
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0010] In order to achieve the above object, the present invention provides a low-illuminance image color preservation enhancement method based on improved Retinex, which integrates fast guiding filter, single-scale Retinex and mult

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  • Low illumination image color preserving enhancement method based on improved Retinex
  • Low illumination image color preserving enhancement method based on improved Retinex
  • Low illumination image color preserving enhancement method based on improved Retinex

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[0070] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the examples are only used to illustrate the present invention, but not to limit the protection scope of the present invention. In addition, it should be understood that after reading the content of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope of protection defined in the present application.

[0071] The design idea of ​​the present invention: low-illuminance color images usually have the characteristics of low brightness, low contrast, fuzzy details and high salt and pepper noise, which greatly affects the later image recognition and information extraction. Therefore, aiming at the degradation phenomenon of nighttime images, an improved method of traditional Retinex is proposed. Spe...

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Abstract

The invention discloses a low illumination image color preserving enhancement method based on improved Retinex. The method is concretely performed according to the following steps that a low illumination filtering input diagram I is transformed to a YUV color space from an RGB color space, and a grayscale map is used as the filtering input diagram I; the Y component RY, FGF, i of the reflection component R of the enhanced image are obtained by using the improved Retinex method; the UV component of the enhanced image is calculated; and the enhanced image is transformed to the RGB color space from the YUV color space, and color component feedback type enhancement is performed on the transboundary pixel points so as to obtain the enhanced low illumination color image. The fast guide filter, the single scale Retinex and multichannel color preserving enhancement are fused, the enhanced image color is abundant and brightness and detail enhancement is obvious so that the problems of high time cost and halo, detail blurring and color distortion in the prior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a low-illuminance image color maintenance enhancement method based on improved Retinex. Background technique [0002] In fields such as video surveillance, intelligent transportation, and all-weather combat, it is inevitable to obtain low-light images with poor imaging quality. Due to uneven lighting distribution or lack of light sources, image degradation in brightness, contrast and detail performance is very serious. These degraded images not only make it difficult for people to obtain enough effective information from them, affecting the visual effect, but also indirectly affect the efficiency and accuracy of some low-light image enhancement methods. Therefore, the enhancement processing of low-light images at night has always been a focus in the field of image processing. [0003] At present, many enhancement methods have appeared for the degradation of low-light ima...

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Application Information

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IPC IPC(8): G06T5/00G06T7/90
CPCG06T5/00G06T5/003G06T7/90G06T2207/10024G06T2207/20024G06T2207/20192
Inventor 朴燕廖述京
Owner CHANGCHUN UNIV OF SCI & TECH
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