A kind of infrared image enhancement method

A technology of infrared images and pixels, applied in image enhancement, image data processing, instruments, etc., can solve problems such as complex calculations and large system resource consumption, and achieve the effect of simple calculations

Active Publication Date: 2016-06-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] In the existing infrared image enhancement methods, the calculation is usually complicated and requires a lot of system resources

Method used

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  • A kind of infrared image enhancement method
  • A kind of infrared image enhancement method
  • A kind of infrared image enhancement method

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Embodiment Construction

[0028] The specific steps of the infrared image enhancement method according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Usually the image data obtained from the infrared detector is an N-bit binary value. In order to be able to display the infrared image data, it is necessary to convert the image data from the N-bit binary to the value range for display (usually the range is 0 to 255). This transformation is usually achieved with a grayscale linear stretching method. The gray scale linear stretching method provides a linear calculation formula to map the image data to the display value range. The specific conversion process can be as follows figure 1 shown.

[0030] figure 1 The middle r axis represents the image data acquired by the detector before transformation, and the minimum value of the image data is r min , with a maximum value of r max . The S axis represents the transformed ...

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Abstract

The embodiment of the present invention discloses and provides an infrared image enhancement method, which performs histogram statistics on the image, and performs operations on the histogram to obtain a grayscale array of the extreme value of the number of pixels, and uses the array to judge that the histogram distribution belongs to a single peak or bimodal. According to the different types of histogram distribution, the respective expansion area and compression area are obtained, and the gray value in the expansion area and compression area is expanded and compressed by linear transformation, and finally the purpose of image enhancement is achieved. The algorithm is relatively simple in operation and does not involve complex operations. At the same time, it overcomes the shortcomings of enhancing the background and noise, inability to effectively enhance the target gray level, and dark image brightness encountered in the process of direct linear transformation of gray scale.

Description

technical field [0001] The invention relates to the technical field of infrared image processing, in particular to an infrared image enhancement method. Background technique [0002] Due to the imaging characteristics of the system itself during the imaging process of the infrared imaging system, the resulting image has the characteristics of low signal-to-noise ratio, low contrast, and almost no texture information. Therefore, in order for the human eye to obtain the visual information in the infrared image, a series of processing needs to be performed on the infrared image, including image non-uniformity correction, blind pixel compensation, image enhancement, etc. [0003] Image enhancement is an important method of infrared image processing. There are many methods of infrared image enhancement, which can be divided into: [0004] (1) Spatial domain processing: directly process the grayscale of infrared images. Common methods include: spatial domain filtering, grayscale...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 刘子骥马宣章翔易乐郑兴蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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