Nonlinear adaptive infrared image enhancing method

An infrared image, self-adaptive technology, used in image enhancement, image data processing, instruments, etc., can solve the problems of flicker, noise suppression and poor scene adaptability, achieve low power consumption, expand the effective grayscale range, and maintain details Effect

Inactive Publication Date: 2011-07-20
中国兵器工业系统总体部
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Problems solved by technology

[0014] The technical problem to be solved by the present invention is to provide a non-linear adaptive infrared image enhancement method, which can not only significantly improve image contrast, but also maintain image details, and solve the noise suppression ability and scene adaptation of traditional image enhancement methods in simple backgrounds. Poor performance, and problems such as "flicker" in infrared video when the scene changes greatly, so as to improve the environmental adaptability of the infrared imaging system

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Embodiment Construction

[0037] see figure 1 As shown, a nonlinear adaptive infrared image enhancement method of the present invention includes the following steps.

[0038] Step 1, histogram statistics: input the original image data, and count the image histogram of the nth frame.

[0039] Step 2, analyze the histogram: On the basis of the histogram, record and count information such as the size, position and width of each peak and trough, and jointly judge the series of peaks corresponding to the gray level distribution of the image, and find and determine the main peak. The peak width is 0.707 times the position difference between two adjacent troughs.

[0040] Step 3, introduce the human visual perception function: apply the formula to the main peak

[0041] f ( i ) = log [ ( wd 0 ) · ...

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Abstract

The invention relates to a nonlinear adaptive infrared image enhancing method, which comprises the following steps: A) inputting original image data and counting a histogram; B) analyzing the histogram and counting the sizes, positions and widths of each crest and trough, and confirming a main peak; C) substituting the main peak in an application formula and acquiring a nonlinear mapping curve through calculation; D) calculating to acquire a gray level histogram mapping table corresponding to the whole image; and E) using the histogram mapping table established in the step D to perform table look-up mapping on the histogram counted in the step A), thereby forming a new image data, sending the image data to a terminal and displaying. By using the nonlinear adaptive infrared image enhancing method provided by the invention, the image contrast can be obviously promoted while the image details are maintained, and the problems of the traditional image enhancing method that the noise suppression capability and the scene adaptability are inferior under a simple background and the infrared video flickers when the scene changes largely are solved, thereby increasing the environmental adaptability of an infrared imaging system.

Description

technical field [0001] The invention relates to the research fields of infrared imaging components and infrared thermal imaging, in particular to a nonlinear self-adaptive infrared image enhancement method of infrared imaging components. Background technique [0002] The third-generation infrared thermal imaging system based on staring infrared focal plane devices has been widely used in night vision, astronomy, maritime rescue search, industrial thermal detection, military and medical fields. However, because infrared thermal imaging depends on the radiation difference between various imaging factors in the scene, the effective gray scale of the original image output by the infrared focal plane array is too concentrated, and conventional processing methods have disadvantages such as poor target contrast and blurred scene details. Therefore, it is very necessary to enhance the original image data output by the infrared focal plane array to make it suitable for specific appli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/40
Inventor 王新星王军力李玉珏陈小明邸超
Owner 中国兵器工业系统总体部
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