Small infrared object detection method in complex cloud sky background

A technology of infrared targets and detection methods, applied in instruments, character and pattern recognition, computer components, etc.

Active Publication Date: 2015-08-12
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 used

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  • Small infrared object detection method in complex cloud sky background
  • Small infrared object detection method in complex cloud sky background
  • Small infrared object detection method in complex cloud 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

The invention discloses a small infrared object detection method in a complex cloud sky background, and relates to the technical field of digital image processing, for the purposes of effectively detecting a small infrared object in a complex cloud sky background and solving the problems of quite high false alarm rate, quite high residual error rate and the like which are easily caused because the cloud layer boundary of an infrared image in a complex cloud layer background has a similar thermal imaging characteristic with an object. A multiple-dimensioned local difference contrast operator and a weight local image entropy operator are brought forward, and then a local weight difference graph is obtained through dot product operation, such that the complex cloud sky background and the noise are effectively inhibited, the object is enhanced, and the object detection rate is finally substantially improved, and the false alarm rate is reduced.

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...

Claims

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Application Information

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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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