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Platform histogram equalization method for infrared image

A histogram equalization and infrared image technology, which is applied in image enhancement, image data processing, instruments, etc., can solve the problems of poor contrast and poor visual effect of infrared images, and achieve the effect of enhancing contrast and enriching layering

Inactive Publication Date: 2015-06-03
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

[0003] The purpose of the present invention is to provide a platform histogram equalization method for infrared images to solve the problems of poor visual effect and poor contrast of existing infrared images

Method used

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  • Platform histogram equalization method for infrared image
  • Platform histogram equalization method for infrared image
  • Platform histogram equalization method for infrared image

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Embodiment

[0026] A method for histogram equalization of an infrared image improvement platform proposed by the present invention, with specific examples to illustrate the specific steps as follows:

[0027] 1) if figure 2 As shown, the number of grayscale pixels of the image is counted from the first pixel on the entire image;

[0028] 2) Find out the maximum value and minimum value of the gray level with the number of pixels greater than 0;

[0029] 3) Select a times the minimum value calculated in step 2 (generally between 1.0-1.2, here a takes 1.1) as the minimum platform value, and select b times the maximum value (generally between 0.7-1 , where b takes 0.8) as the maximum platform value;

[0030] 4) Set the gray value smaller than the minimum platform value as the minimum platform value, and set the gray value greater than the maximum platform value as the maximum platform value;

[0031] 5) Divide the gray value of the image into n subintervals with approximately equal number...

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Abstract

The invention relates to a platform histogram equalization method for an infrared image and belongs to the technical field of image enhancement. The method comprises the steps of firstly choosing a threshold value of an image input platform and then changing a gray value of an infrared image; and on the basis that the infrared image is fully analyzed to be poor in contrast ratio and weak in hierarchical sense, after the infrared image is subjected to platform threshold value selection, achieving subsection linear drawing histogram equalization process, so that the hierarchical sense of the image is enriched, and the infrared image is enhanced effectively.

Description

technical field [0001] The invention relates to a platform histogram equalization method for infrared images, belonging to the technical field of image enhancement. Background technique [0002] An infrared image is an imaging of the thermal radiation distribution of a scene. Because the temperature difference between the target and the background in the scene is relatively small, the visual effect of the infrared image is poor, and the image is blurred and the contrast is poor. In order to make full use of the given gray dynamic range, make the infrared image have a richer sense of hierarchy visually, and enhance the image contrast, therefore, a histogram equalization method for infrared image improvement platform is proposed to improve the imaging quality. Contents of the invention [0003] The purpose of the present invention is to provide a platform histogram equalization method for infrared images to solve the problems of poor visual effect and poor contrast of exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/40
Inventor 李玉岩汪江华赵凯生孙小亮
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC