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A method and device for image contrast enhancement

A technology of image contrast and contrast, applied in image enhancement, image data processing, instruments, etc., can solve the problems of image detail information blurring, lack of detail edge information, image over-enhancement, etc., to avoid over-enhancement phenomenon, rich and clear detail texture information effect

Active Publication Date: 2017-04-12
湖北九感科技有限公司
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Problems solved by technology

[0005] In the prior art, although the histogram equalization can enhance the contrast of the image, this method lacks the consideration of the detail edge information of the image, the enhanced image detail information is blurred, and the image obtained by this method is prone to over-enhancement phenomenon

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  • A method and device for image contrast enhancement
  • A method and device for image contrast enhancement
  • A method and device for image contrast enhancement

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] figure 1 It is a flow chart of a contrast enhancement method provided in the embodiment of the present invention, see figure 1 , the method includes:

[0040] 101: Decompose the image to be processed by using the inverse connection model and the normalization method in the pulse-coupled neural network model to obtain a decomposed image, where the decomposed image refers to an image containing brightness information in the image to be processed;

[0041] Wherein, the image to be processed is a digital image with low contrast. Those skilled in the art can know that the basic constituent unit of a digital image is a pixel (or pixel, Pixel), which is obtained by discretely sampling a continuous space when an analog image is digiti...

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Abstract

The invention discloses a method and device for enhancing the image contrast ratio, and belongs to the field of digital image processing. The method comprises the steps that an image to be processed is decomposed by using a retroflection connection model in a pulse coupling neural network model and a normalization method, and a decomposed image is obtained and is an image containing brightness information of the image to be processed; the image to be processed is divided by the decomposed image to obtain a contrast-enhanced image. According to the method and device for enhancing the image contrast ratio, the image to be processed is decomposed by using the retroflection connection model in the pulse coupling neural network model and the normalization method, the contrast ratio of the obtained decomposed image is enhanced, and therefore the enhanced image has abundant and clear detail texture information, and the phenomenon of excessive enhancement is avoided.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a method and device for image contrast enhancement. Background technique [0002] Digital Image Processing (DIP), also known as computer image processing, refers to the process of converting image signals into digital signals and processing them with a computer. By processing images with digital image processing technology, useful information can be obtained to the greatest extent. In the process of image acquisition, due to the influence of lighting, acquisition equipment, environment and other factors, the acquired images are prone to low contrast, which is not conducive to the observation and analysis of human eyes. Therefore, image enhancement for images with low contrast is particularly important. . [0003] In the existing technology, histogram equalization is often used to enhance the contrast of the image. This method adjusts the probability distribution of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 徐光柱雷帮军李春林
Owner 湖北九感科技有限公司
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