Infrared weak small target detection method based on space-time characteristics

A technology of weak and small targets and detection methods, applied in image data processing, instruments, calculations, etc., can solve the problem of inability to effectively eliminate interference, and achieve the effect of eliminating cloud interference, reducing false alarm rate, and improving detection probability.

Inactive Publication Date: 2019-06-11
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a detection method for weak and small infrared targets based on spatio-temporal characteristics for the detection method of weak and small infrared targets in the prior art.

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  • Infrared weak small target detection method based on space-time characteristics
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  • Infrared weak small target detection method based on space-time characteristics

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specific Embodiment approach 1

[0044]DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. The present invention provides a method for detecting dim and small infrared targets based on spatio-temporal characteristics, combining Figure 1 to Figure 5 shown, including:

[0045] Obtain the high-frequency component filter map of the target infrared image, and determine multiple suspicious targets from the high-frequency component filter map;

[0046] For each suspicious target, the gray scale distribution nine-square grid is used to calculate the spatial distribution characteristics of the neighborhood energy, and then the texture gradient distribution characteristics are calculated, and then the azimuth pitch scale ratio of the suspicious target and the target saturation are judged, and finally the time domain of the target is calculated. Judgment of distribution characteristics, gradually eliminate false targets in suspicious targets, and finally determine the real target.

[0047] In this embodiment, the pur...

specific Embodiment

[0098] Specific embodiments: the specific equipment for implementing the method of the present invention, its image signal processor hardware platform can be constructed by TMS320C6455DSP produced by TI Company, and realized by programming in C language. The pre-written C language program can be compiled and solidified on the image signal processor hardware, and the DSP automatically loads the program to run after power on. The specific process is as figure 1 shown.

[0099] For the pure air background, first analyze the eight-neighborhood space of the suspicious target. Air targets, such as aircraft, UAVs and missile targets, carry out gray-scale mean and gray-scale variance analysis on the target area and its eight-neighborhood space. Calculation, the gray mean and variance of the target are larger than its neighborhood area. When a candidate target does not meet this criterion, the candidate target is cloud interference or detector noise, and it will be eliminated.

[01...

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Abstract

The invention relates to an infrared weak small target detection method based on space-time characteristics, which comprises the following steps of: obtaining a high-frequency component filter diagramof a target infrared image, and determining a plurality of suspicious targets by the high-frequency component filter diagram; calculating neighborhood energy space distribution characteristics of each suspicious target by sequentially utilizing gray scale distribution nine-grid cells; obtaining a suspicious target, calculating a texture gradient distribution characteristic, judging according to an azimuth pitching scale ratio and target saturation of the suspicious target, finally judging a target time domain distribution characteristic, gradually eliminating a pseudo target in the suspicioustarget, and finally determining a real target. According to the method, cloud layer interference, ground object interference, detector noise interference and the like in a weak small target background can be effectively eliminated, so that a real target is reliably determined, the false alarm rate of target detection can be greatly reduced, and the detection probability is improved.

Description

technical field [0001] The invention relates to the technical field of detection of weak and small targets, in particular to a detection method for small and weak infrared targets based on spatio-temporal characteristics. Background technique [0002] Infrared imaging target detection technology is widely used in precision guidance, detection and warning and other weaponry systems due to its good real-time performance, strong concealment and strong anti-interference ability. [0003] In practical applications, it is required that the detection system should detect distant targets as much as possible. Since the long-distance target is very weak in the field of view, and the background is complex, such as cloud interference, ground object interference, etc., the contrast between the target and the background is low, and there are many interference objects in the background. Therefore, how to eliminate false targets from many interference sources , to obtain the real target be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/246G06T5/00
Inventor 张挺崔述金赵凯侯棋文李斌崔洪
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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