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 value of the gray scale, darker image ratio, etc., and achieve good display effect and avoid interference

Active Publication Date: 2012-12-19
UNIV OF ELECTRONIC 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 infrar

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  • Linear stretching method of infrared image

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[0022] like figure 1 As shown, in an embodiment of the present invention, a linear stretching method for an infrared image includes step 10 , step 12 , step 14 , step 16 and step 18 .

[0023] Step 10: Acquire an infrared image.

[0024] 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 for infrared imaging of an object with an infrared imaging system may use a method commonly used in the art, which will not be described in detail here.

[0025] Usually, the maximum and minimum grayscale values ​​obtained by infrared imaging systems for different objects are different, 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 acquired infrared image) is not...

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Abstract

The embodiment of the invention discloses a linear stretching method of an infrared image. The linear stretching method of the infrared image comprises the following steps of: establishing a maximal binary heap and a minimal binary heap by using the pixel point gray value of the infrared image; using a root node of the maximal binary heap as a dark spot gray value; using the root node of the minimal binary heap as a bright spot gray value; acquiring stretching parameters according to the bright spot gray value and the dark spot gray value; and stretching the infrared image by using the stretching parameters. In the embodiment of the invention, the maximal binary heap and the minimal binary heap are established by using the pixel point gray value of the infrared image, the root node of the minimal binary heap is used as the bright spot gray value, the root node of the maximal binary heap is used as the dark spot gray value, and therefore, the interference of noises on the bright spot gray value and the dark spot gray value is prevented and a bright spot and a dark spot of the infrared image can be better reflected; and the stretching parameters of the infrared image are generated according to the bright spot gray value and the dark spot gray value, and therefore, the infrared image can be more accurately stretched.

Description

[0001] technical field [0002] The invention relates to the technical field of infrared imaging, in particular to a linear stretching method of an infrared image. Background technique [0003] 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. [0004] 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 ...

Claims

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Application Information

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