Video image enhancement method and device

A technology of a video image and enhancement device, applied in the field of image processing, can solve the problems of distortion of effect, unutilized gray level, uncomfortable real-time enhancement processing of video stream, etc.

Active Publication Date: 2016-05-25
ZHEJIANG UNIVIEW TECH CO LTD
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Problems solved by technology

This algorithm requires loops and has relatively high complexity, so it is not suitable for real-time enhancement processing of video streams
[0004] It can be seen that in the existing technical solutions, there are many gray levels that are not used in the common histogram equalization solution, and the underutilization of the gray levels is one of the reasons for the over-equalization
In addition, when using the classic equalization method for image enhancem

Method used

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  • Video image enhancement method and device
  • Video image enhancement method and device

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] Such as figure 1 Shown is a flow chart of the video image enhancement method provided by the embodiment of the present invention, and the method includes the following steps:

[0042] Step S101, the image to be enhanced is divided into a plurality of image blocks of the same size, and the gray histogram statistics are performed on each image block to obtain the image information of each image block, and the image information includes: each gray level in the image block The histogram height of the level, the gray mean and gray variance of the image block.

[0043] In the embodiment of the p...

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Abstract

The invention discloses a video image enhancement method and device. The method comprises the following steps: dividing an image to be enhanced into a plurality of image blocks with the same size, acquiring the image information of the image blocks, acquiring a local histogram height threshold according to the image information, adaptively adjusting the contrast of the image blocks according to the local histogram height threshold, acquiring grey values of central pixel points of all image blocks according to a contrast adjustment result, acquiring the grey values of the central pixel points of non-image blocks in the enhanced image by interpolation, and outputting the enhanced image. The device comprises a division module, a computing module, a contrast adjusting module and an interpolation module. The method and the device disclosed by the invention are used for adopting corresponding local histogram height thresholds to enhance the contrast of different image blocks, uniform and sufficient tiling on the gray level can be realized, and the adaptability to different monitoring scenes is strong.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a video image enhancement method and device. Background technique [0002] Due to factors such as weather conditions, brightness conditions, and capture equipment, the nighttime surveillance video is not clear or even abnormally blurred, which is not conducive to monitoring and cannot meet the needs of applications. But nighttime video surveillance has practical application value, so nighttime video enhancement algorithm is worth studying. [0003] The video enhancement algorithm can be divided into two types: spatial domain-based video enhancement and frequency domain-based video enhancement according to the different processing spaces. Video enhancement based on frequency domain processes images through indirect operations in the transform domain of images. The most commonly used transform is the Fourier transform. Video enhancement based on the frequency...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T5/40
CPCG06T5/002G06T5/003G06T5/40G06T2207/10016G06T2207/20192
Inventor 王智玉朱旭东
Owner ZHEJIANG UNIVIEW TECH CO LTD
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