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A small infrared target detection method under complex cloudy sky background

A technology of infrared target and detection method, which is used in instruments, character and pattern recognition, computer parts and other directions to achieve the effect of improving detection probability, high signal-to-noise ratio gain, and reducing false alarm probability

Active Publication Date: 2017-12-19
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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Problems solved by technology

[0006] The present invention aims at the above-mentioned technical problems existing in the existing small infrared target detection method under complex cloudy sky background, and provides a small infrared target detection method under complex cloudy sky background

Method used

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  • A small infrared target detection method under complex cloudy sky background
  • A small infrared target detection method under complex cloudy sky background
  • A small infrared target detection method under complex cloudy sky background

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Embodiment

[0046] figure 1 It is a schematic block diagram of the structure of the embodiment of the present invention. It mainly includes: image input, multi-scale local difference contrast solution, weighted local image entropy solution, dot product operation, adaptive threshold solution, and binarization.

[0047] Specifically:

[0048] Step 1, input a small infrared target image under a complex cloudy sky background, and solve the multi-scale local difference contrast C of the infrared image:

[0049]The infrared small target image under the complex cloud background generally consists of four parts: target, homogeneous sky background, complex cloud background and noise. Complex cloud boundaries have similar thermal imaging features to targets, which have a greater impact on target detection performance. The core idea of ​​the multi-scale local difference contrast operator is to measure the gray level difference between the target area and the neighborhood in the infrared image, so...

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Abstract

In order to effectively detect small infrared targets under complex cloudy sky backgrounds, the invention discloses a small infrared target detection method under complex cloudy sky backgrounds, which relates to the technical field of digital image processing. In view of the fact that the cloud layer boundary of the infrared image under the complex cloud layer background has thermal imaging characteristics similar to the target, which easily leads to high false alarm rate and missed detection rate, etc., the present invention proposes a multi-scale local difference contrast operator and a weighted local image entropy calculation Then the local weighted difference map is obtained by dot product operation, so as to effectively suppress the complex cloud background and noise, enhance the target, and finally greatly improve the target detection rate and reduce the false alarm rate.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a small infrared target detection method under complex cloudy sky background. Background technique [0002] Object detection technology has been widely used in remote sensing, monitoring, aerospace and other fields. Compared with the radar system, the infrared system has simple structure, high resolution, strong concealment and anti-interference ability. Compared with visible light system, infrared system has all-weather working ability and strong smoke penetration ability. Effective detection of small targets with unknown positions and velocities (such as aircraft and missiles) under low signal-to-noise ratio conditions can greatly increase the effective range of infrared systems and reduce the complexity of equipment, so this type of technology has received widespread attention. [0003] However, due to the long imaging distance of the infrared system (such a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V20/52
Inventor 周欣邓鹤孙献平叶朝辉刘买利
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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