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A Gradient Domain Video Contrast Enhancement Method

A gradient domain and contrast technology, applied in color TV, color TV components, color signal processing circuits, etc., can solve the problem of video whitening and degradation, and achieve the effect of overcoming video flicker

Inactive Publication Date: 2020-03-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above deficiencies in the prior art, a gradient domain video contrast enhancement method provided by the present invention solves the problem of video whitening and degradation

Method used

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  • A Gradient Domain Video Contrast Enhancement Method
  • A Gradient Domain Video Contrast Enhancement Method
  • A Gradient Domain Video Contrast Enhancement Method

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Embodiment Construction

[0028] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0029] Such as figure 1 As shown, the gradient domain video contrast enhancement method includes the following steps:

[0030] S1. Using the gradient domain enhancement method to enhance the video to be processed frame by frame, and decomposing the gradient domain enhanced video into low-frequency component images and high-frequency component images;

[0031] S2. Filter the low-frequency component image of the current fram...

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Abstract

The invention discloses a gradient domain video contrast enhancement method, which includes the following steps: S1. Using the gradient domain enhancement method to enhance the video to be processed frame by frame, and decomposing the gradient domain enhanced video into low-frequency component images and high-frequency component images ; S2. Filter the low-frequency component image of the current frame according to the low-frequency component image adjacent to the front of the current frame to obtain the filtered low-frequency component image of the current frame; S3. Filter the low-frequency component image of the current frame after filtering and its corresponding high-frequency The component images are combined to obtain an enhanced image, and the gradient domain video contrast enhancement is realized. The present invention uses the low-frequency component correlation characteristics between adjacent video frames to filter the gradient-enhanced video frames, and effectively overcomes the video flickering caused by the gradient domain enhancement method based on a single frame while making full use of the advantages of the gradient domain enhancement method question.

Description

technical field [0001] The invention relates to the technical field of video enhancement, in particular to a gradient domain video contrast enhancement method. Background technique [0002] Video enhancement technology is a kind of image processing technology, which can significantly improve video quality, make video content more layered and subjective observation effect more in line with people's needs. However, in real life, due to some factors of the imaging device: such as the small aperture, the incoming light transmitted to the sensor is relatively small, resulting in dark images and low video contrast; or due to excessive aperture or If the exposure time is too long, the sensor will be overexposed and the image will be abnormal, resulting in degraded results such as overall whitening of the obtained video. Contents of the invention [0003] In view of the above-mentioned shortcomings in the prior art, a gradient domain video contrast enhancement method provided by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64
CPCH04N9/646
Inventor 徐进傅志中罗文城赵宇飞李晓峰周宁
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA