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Low-light video image reinforcing method

A video image and low-illumination technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as time-consuming, inability to achieve video enhancement, and large amount of calculation

Inactive Publication Date: 2014-02-19
DALIAN UNIV OF TECH
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Problems solved by technology

However, this method requires a very large amount of calculation. Although it has a certain enhancement effect on the image, it takes a lot of time to process and cannot achieve real-time video enhancement.

Method used

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Embodiment Construction

[0055] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0056] The low-illuminance video image enhancement method disclosed in the present invention first performs intra-frame enhancement on a frame of the video image: in the process of enhancement, it is necessary to calculate the enhancement parameters, and then perform image reconstruction according to the enhanced image information, so that the image becomes Clearer. Then carry out the inter-frame enhancement of the video image: first use the above-mentioned one-frame image as a standard frame image, compare the characteristics of the next frame image of the standard frame image with the characteristics of the standard frame image, and judge whether it is necessary to re-establish the standard...

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Abstract

The invention discloses a low-light video image reinforcing method. The method includes the following steps that video image intra-frame reinforcement is achieved; a frame image of a video undergoes intra-frame reinforcement, the reinforcement parameters are calculated and image reconstruction is carried out according to reinforced image information; video image inter-frame reinforcement is achieved; the frame image serves as a standard frame image; features of a next frame image of the standard frame image are compared with features of the standard frame image, whether the standard frame image needs to be reconstructed or not is judged and intra-frame reinforcement is carried out on the next frame image according to the reinforcement parameters of the determined standard frame image. The method is carried out until the whole video image is reinforced. Gray stretch is carried out on the low-light part of the image, noise will not be reinforced in the reinforcement process and basic information of image gray is maintained.

Description

technical field [0001] The invention relates to the technical field of video image processing, in particular to a low-illuminance video image enhancement method. Background technique [0002] With the rapid development of computer technology and multimedia technology, digital video processing has been widely used in video surveillance, video conference systems and other fields. The acquisition of video images is often affected by ambient light conditions. For example, low ambient light or improper exposure such as backlighting will cause video images to have low contrast, missing details, or unnatural colors. Therefore, it is necessary to adopt video image enhancement technology to improve and enhance the quality of low-light video images. [0003] Low-illuminance video image enhancement requires stretching the grayscale of the low-illuminance part of the image, and at the same time, it must ensure that the noise will not increase during the image enhancement process, and t...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T5/40
Inventor 陈喆殷福亮蒋羽超
Owner DALIAN UNIV OF TECH
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