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Method for enhancing infrared image

An infrared image and image pixel technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of misjudgment of weak and small targets, occupying a lot of resources, and long computing time, so as to improve the enhancement effect, improve operating efficiency, and avoid The effect of miscalculation

Inactive Publication Date: 2012-04-25
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

[0002] In infrared image enhancement, there are many bad element detection and filling algorithms, such as Algorithms, etc. In addition to the disadvantages of long operation time and resource consumption, this type of algorithm is very likely to detect weak objects as bad elements and fill them in during the real-time detection process, resulting in the loss of objects
Although some bad element detection methods have been optimized and improved, their misjudgment of weak targets may still exist, which may have serious consequences in some infrared systems

Method used

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  • Method for enhancing infrared image
  • Method for enhancing infrared image

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Embodiment Construction

[0014] Such as Figure 1-4 As shown, the steps of the infrared image enhancement method are as follows:

[0015] (1) Apply the two-point correction algorithm to perform non-uniform correction on several frames of infrared images;

[0016] (2) Collect the corrected image pixel information of the infrared image;

[0017] (3) For the pixels in it , take the pixel gray value of its four neighbors, and take the median value of the 5 pixel sets ,in The selected position does not include the boundary position of the image; if and The difference is greater than the set threshold (the empirical threshold is obtained according to the actual test results), then the pixel is bad yuan, then for bad yuan The gray value of is replaced by the average gray value of surrounding pixels; until all pixels of the infrared image are traversed;

[0018] (4) Store all the bad element filling results into the coefficient table, and directly call the coefficient table to replace the b...

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Abstract

The invention relates to a method for enhancing an infrared image and belongs to the technical field of image enhancement. The method comprises the following steps of: according to a gray value of the infrared image of a certain initial frame, performing median filtering on pixels one by one, and detecting and filling bad pixels; after calculation of the whole image is finished, storing a filling result of all bad pixels into a coefficient table; and directly calling the coefficient table for filling during subsequent image processing. Therefore, operation efficiency is improved, and error judgment of effective pixels is avoided. The method has the advantages that: by fully utilizing an image scene and gray distribution information, the gray distribution of a target scene is utilized to the largest extent, the interference of a background noise is eliminated to the largest extent, the detection efficiency and filling efficiency of the bad pixels are improved, all pieces of operation can be finished during initiation of a system, and effective targets cannot be determined to be the bad pixels during using of the system, so that the using range of a median filtering method can be greatly expanded, and an enhancement effect can be improved.

Description

technical field [0001] The invention relates to an infrared image enhancement method, which belongs to the technical field of image enhancement. Background technique [0002] In infrared image enhancement, there are many bad element detection and filling algorithms, such as Algorithms, etc. In addition to the disadvantages of long computing time and resource consumption, this type of algorithm is very likely to detect weak and small targets as bad elements and fill them in during the real-time detection process, resulting in target loss. Although some bad element detection methods have been optimized and improved, their misjudgment of weak and small targets may still exist, which may bring serious consequences in some infrared systems. Contents of the invention [0003] The purpose of the present invention is to provide an infrared image enhancement method to effectively detect bad or blind pixels and avoid misjudgment of weak and small objects. [0004] In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 崔岩贾俊涛
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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