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Method and device for improving information entropy of histogram technology enhanced image

A technology to enhance image and information entropy, applied in the field of image processing, can solve the problems of poor gray level, loss of gray level, loss of detail information, etc., achieve high signal-to-noise ratio, clear presentation, and increase the effect of gray level

Active Publication Date: 2020-10-30
JIANGSU UNIV OF TECH
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Problems solved by technology

[0003] However, image enhancement methods based on histograms generally have high contrast (such as classic histogram equalization methods and improved methods, etc.), but are prone to loss of gray levels (poor gray levels) and loss of detail information. The problem of low image information entropy index

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  • Method and device for improving information entropy of histogram technology enhanced image

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Embodiment Construction

[0033]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] The present invention is made based on the research and cognition of the following problems:

[0035] In the computer, an image is composed of a series of numbers, that is, an 8-bit grayscale image, and the value of each pixel changes [0, 255]. figure 1 A partial grayscale image of the image is shown. The so-called histogram is to count each gray level, such as figure 1 The gray level of 102 appears 20 times in total, and the gray level of 103 appears ...

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Abstract

The invention provides a method and device for improving the information entropy of a histogram technology enhanced image, and the method comprises the steps of obtaining the frequency of occurrence of each gray scale of the enhanced image, storing the gray scale of which the frequency is not zero in a first array ideq, and storing the frequency in a second array heq; calculating a difference value jg (j) of adjacent gray levels in the ideq and storing the difference value jg (j) in a third array jg; taking jg (j) sequentially from jg, and when jg (j) is not 1, calculating a gray interpolationtemp and a corresponding occurrence frequency htemp; performing interpolation according to the temp and the htemp; jg (j) taking all the updated ideq and heq; calculating a difference value jg1 (j) of adjacent gray levels in the updated ideq and storing the difference value jg1 (j) in jg1; and if jg1 is equal to jg, outputting an image matrix. Therefore, the image enhanced by the histogram technology is subjected to grayscale interpolation, so that the image has high contrast, high information entropy and high signal-to-noise ratio, and image details are clearly presented.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method for increasing the information entropy of an image enhanced by histogram technology, a device for increasing the information entropy of an image enhanced by histogram technology, a non-temporary computer-readable storage medium, and a computer equipment. Background technique [0002] The histogram-based image enhancement technology is a common method of image preprocessing, which is mainly used to improve the visual effect of the image, improve the image contrast, and facilitate subsequent image understanding and analysis. [0003] However, image enhancement methods based on histograms generally have high contrast (such as classic histogram equalization methods and improved methods, etc.), but are prone to loss of gray levels (poor gray levels) and loss of detail information. The problem of low image information entropy index. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/40
CPCG06T5/40Y02D10/00
Inventor 王海峰章怡范鑫陈海忠吴卫华薛勇
Owner JIANGSU UNIV OF TECH
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