Robust and comprehensive low-quality illumination image enhancement method based on Retinex

An image enhancement and low-quality technology, applied in the field of image processing, can solve the problems of difficult recognition, low image information content, and difficult analysis, etc., and achieve the effect of brightness enhancement, good enhancement effect, and artifacts
CN110570360AActive Publication Date: 2019-12-13KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2019-12-13

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Abstract

The invention relates to a robust and comprehensive low-quality illumination image enhancement method based on Retinex, and belongs to the technical field of image processing. The method comprises thefollowing steps: firstly, introducing a bright channel to carry out preliminary estimation on a brightness image in a Retinex model; secondly, modifying global illumination intensity distribution through two morphological closed operators; then, correcting the artificial edge by using a guide filter to obtain an estimated illumination image; and finally, separating the illumination image in the original image by using a Retinex algorithm to obtain a high-quality illumination image. Compared with other enhancement methods based on Retinex, the method provided by the invention has the advantages that the enhancement effect is better, the brightness is more uniform after enhancement, artifacts are not generated, and an excessive sharp effect is not generated at the edge.
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Description

technical field

[0001] The invention relates to a robust and comprehensive low-quality illumination image enhancement method based on Retinex, which belongs to the technical field of image processing. Background technique

[0002] The external lighting environment will affect the final imaging effect of the image acquisition device. For example, under the condition of sufficient and evenly distributed light during the day, the image acquisition device can obtain a good imaging effect. However, in environments with uneven lighting or poor lighting, such as shadows, darker areas with light sources, or night or low-light indoors, for example, images containing illuminated areas and non-illuminated areas in daytime imaging, night imaging Including light area and no light area, night scene and so on. In the imaging environment, low brightness or uneven brightness distribution will lead to unclear details in the darker parts of the imaging results, susceptible to noise, indistin...

Claims

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