Image enhancement method and device

An image enhancement and image technology, which is applied in the field of image processing, can solve the problems of unsatisfactory users and poor image enhancement effects, and achieve the effects of reducing jitter, improving enhancement effects, and avoiding blur
CN101853497AInactive Publication Date: 2010-10-06HANGZHOU HIKVISION DIGITAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU HIKVISION DIGITAL TECH
Publication Date
2010-10-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The embodiment of the invention discloses an image enhancement method and an image enhancement device. The method comprises the following steps of: performing gray level stretching on a target image and performing gray level mapping on the stretched image to obtain an overall gray level mapping value of the target image; segmenting the target image into image units, wherein a square area consisting of every nine image units is a local block, and a square area consisting of every four image units in the local block is an image block; performing gray level stretching on four image blocks in each local block and performing gray level mapping on the stretched image blocks respectively to obtain gray level mapping values of the image blocks; weighting and summing the gray level mapping values of the image blocks to obtain a local gray level mapping value of the target image; and performing arithmetic average on the overall gray level mapping value and the local gray level mapping value to obtain a gray level enhancement value of the target image. According to the embodiment of the invention, the enhancement effect of images can be improved and the user requirements can be met.
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Description

technical field

[0001] The present application relates to the technical field of image processing, in particular to an image enhancement method and device. Background technique

[0002] Usually, during the process of capturing video images by the image acquisition device, due to the influence of some environmental factors, there may be some problems affecting the image quality in the acquired video images. For example, when the lighting conditions are poor, the captured video image has low brightness and poor contrast, so that the human eye cannot perceive and distinguish detailed information. Therefore, image enhancement is required for the problem image. Image enhancement technology is to enhance the visual effect of the image, make the original unclear image clear or emphasize some interesting features, suppress uninteresting features, improve image quality, enrich information, and strengthen image interpretation and recognition. Effect image processing method. [0003...

Claims

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