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Weak light image enhancing method based on Retinex and Reinhard color migration

An image and color technology, applied in the field of low-light image enhancement, can solve problems such as poor real-time performance, and achieve the effects of good real-time performance, good image enhancement effect, and rich image color information.

Inactive Publication Date: 2014-07-30
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Problems solved by technology

Among them, the most mature application is the Fourier transform, which is based on the Fourier transform of the modified image, transforms the image into the frequency domain, then filters the frequency domain of the image, and finally inversely transforms it into the space domain to obtain enhancement. After the image, but in the real-time processing of the video, the calculation is complex and the real-time performance is poor, which cannot meet the requirements

Method used

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  • Weak light image enhancing method based on Retinex and Reinhard color migration
  • Weak light image enhancing method based on Retinex and Reinhard color migration
  • Weak light image enhancing method based on Retinex and Reinhard color migration

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Experimental program
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Embodiment

[0042] Such as figure 1 Shown, a kind of enhancement method based on the weak light image of Retinex and Reinhard color migration, it is characterized in that, comprises the following steps:

[0043] 1) Read the optimal scale parameter of the Gaussian function;

[0044] 2) Enhance low-light images through the single-scale Retinex algorithm;

[0045] 3) Calculate the color information of the enhanced image through the Reinhard color migration algorithm, and read the color information data of the reference image at the same time;

[0046] 4) Migrate the color information of the reference image to the enhanced image;

[0047] 5) An image with rich colors and outstanding details is obtained.

[0048] Such as figure 2 As shown, the optimal scale parameter of the Gaussian function is calculated as follows:

[0049] 11) Perform single-scale Retinex algorithm processing on low-light images;

[0050] 12) Change the scale parameter of the Gaussian function in the single-scale Ret...

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Abstract

The invention relates to a weak light image enhancing method based on Retinex and Reinhard color migration. The method comprises the following steps of (1) reading optimal scale parameters of a gaussian function, (2) enhancing a weak light image through a single-scale Retinex algorithm, (3) calculating color information of the enhanced image through a Reinhard color migration algorithm, and meanwhile reading color information data of a reference image, (4) migrating the color information of the reference image to the enhanced image, and (5) obtaining an image with the rich colors and outstanding details. Compared with the prior art, the method has the advantages of being good in image enhancement effect, enriching image color information, good in real-time performance and the like.

Description

technical field [0001] The invention relates to a method for enhancing weakly illuminated video images, in particular to a method for enhancing weakly illuminated images based on Retinex and Reinhard color migration. Background technique [0002] Image is an important medium for human beings to transmit information. Among the information processed by human intelligence, visual communication information accounts for more than 75% of the total information received by human beings. Image is an important means for human beings to obtain information, perceive the world, and transform the world. [0003] The construction process of the power grid involves many majors such as project management, civil engineering, and electrical engineering. The cross-industry operations are very obvious, the construction environment is harsh, and there are many construction safety risks and safety hazards. These are the problems that exist in the construction process of the power grid. In contras...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 郑思国刘刚蔡钧陈晓东文光磊宁尚昆
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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