Linear stretching method of infrared image

An infrared image and linear stretching technology, applied in the field of infrared imaging, can solve the problems of inaccurate reflection of the maximum gray value and dark image ratio, and achieve the effect of good display effect and avoidance of interference.

Active Publication Date: 2014-08-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, under the interference of noise, the maximum and minimum gray values ​​of the infrared image usually cannot accurately reflect the bright and dark points of the frame infrared image. If the maximum and minimum gray values ​​are the brightest and the dark points are directly used for linear Stretching will make the contrast of the stretched image darker

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  • Linear stretching method of infrared image

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Embodiment Construction

[0021] Such as figure 1 As shown, in an embodiment of the present invention, a linear stretching method of an infrared image includes step 10, step 12, step 14, step 16 and step 18.

[0022] Step 10: Acquire an Infrared Image.

[0023] In the embodiment of the present invention, an infrared imaging system is first used to perform infrared imaging on an object (ie, an object to be measured or a target to be measured) to obtain an infrared image of the object. The method of using the infrared imaging system to perform infrared imaging on an object may use a method commonly used in the art, and will not be described in detail here.

[0024] Usually, the maximum and minimum grayscale values ​​obtained by the infrared imaging system for images of different objects are not the same, the maximum and minimum grayscale values ​​are related to the temperature of the object, and the range formed by the maximum and minimum grayscale values ​​(that is, The gray value range of the acquire...

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Abstract

The embodiment of the present invention discloses a linear stretching method of an infrared image, comprising: acquiring an infrared image; constructing a maximum binary heap and a minimum binary heap using the pixel gray value of the infrared image; using the root node of the maximum binary heap is the gray value of the dark point; the root node of the minimum binary heap is the gray value of the bright point; the stretching parameter is obtained according to the gray value of the bright point and the gray value of the dark point; the infrared image is stretched with the stretching parameter. In the embodiment of the present invention, the maximum binary heap and the minimum binary heap are constructed with the pixel gray value of the infrared image, and the root node of the minimum binary heap is used as the gray value of the bright spot, and the root node of the maximum binary heap is used as the gray value of the bright spot. The gray value of the dark point avoids the interference of noise on the gray value of the bright point and the gray value of the dark point, and can better reflect the bright and dark points of the infrared image; generate infrared light based on the gray value of the bright point and the gray value of the dark point The stretching parameter of the image, which can stretch the infrared image more accurately.

Description

technical field [0001] The invention relates to the technical field of infrared imaging, in particular to a linear stretching method of an infrared image. Background technique [0002] Due to the imaging mechanism of infrared images and the inherent reasons of infrared imaging systems, compared with visible light images, infrared images mostly have the disadvantages of low contrast, blurred images, low signal-to-noise ratio and images being submerged by the background. A commonly used infrared image enhancement method is linear stretching, which has high computational efficiency because it only involves multiplication, addition, and comparison operations. [0003] Because the original infrared image has blind spots and non-uniformity, before stretching the pixel gray value of the infrared image, it is necessary to perform blind element compensation and non-uniform correction on the pixel gray value of the original infrared image to obtain the non-uniform Corrected infrared ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/20
Inventor 刘子骥杨书兵劳常委蔡贝贝郑兴
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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