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Low illumination level video image enhancement method

A video image and image enhancement technology, applied in the field of image processing, can solve problems such as color cast, dark image brightness, enhanced noise, etc.

Active Publication Date: 2013-12-18
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] Generally, low-light video has three characteristics: (1) The overall brightness of the image is dark; (2) Due to the limitation of lighting conditions and the influence of the light source itself, some components in RGB may be lower than other components, and direct enhancement will produce color cast Problem; (3) Compared with the image acquired under ideal lighting conditions, it contains a lot of noise. If the image is directly enhanced without any processing, the noise will be enhanced while the image is enhanced

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] The complete technical solution provided by the present invention (invention solution)

[0024] The present invention is divided into five modules as a whole, namely white balance processing module, image denoising module, image enhancement module, edge compensation module, and inter-frame compensation module, such as figure 1 shown.

[0025] White Balance Processing Module

[0026] According to the gray-scale world theory, an image with rich enough color changes has roughly the same mean value of its RGB components. The present invention uses the improved white balance method based on the gray scale world method, and its detailed steps are as follows:

[0027] (1) Calculate the brightness histogram of each channel of the image RGB;

[0028] (2) If there is a large area of ​​the same color background or light source in the image, a peak will be generated in the ...

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Abstract

The invention discloses a low illumination level video image enhancement method, and belongs to the technical field of image processing. The method includes a white balance processing module, an image de-noising module, an image enhancement module, an edge compensation module and an interframe compensation module, video image information sequentially passes through the white balance processing module, the image de-noising module, the image enhancement module, the edge compensation module and the interframe compensation module, and finally enhanced video images are obtained.

Description

technical field [0001] The invention relates to a low-illuminance video image enhancement method, which belongs to the technical field of image processing. Background technique [0002] In low-illumination conditions such as cloudy days, nights, and insufficient light, or due to backlighting and other reasons, the brightness of the acquired video is very low and the image is dark, which not only affects the subjective quality of the video image, but also affects the performance of subsequent video processing methods. At this time, low-illuminance video enhancement technology needs to be used for processing to improve the quality of video images. [0003] Generally, low-light video has three characteristics: (1) The overall brightness of the image is dark; (2) Due to the limitation of lighting conditions and the influence of the light source itself, some components in RGB may be lower than other components, and direct enhancement will produce color cast Problem; (3) Compared...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 陈喆殷福亮潘凯
Owner DALIAN UNIV OF TECH
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