A detection method for weak and small targets in sea and air infrared images based on complex scharr filter

A technology for infrared images and weak and small targets, which is applied in image enhancement, image analysis, image data processing, etc., can solve the problems of large amount of calculation, and achieve the effect of less calculation amount, high detection rate and fast processing speed

Active Publication Date: 2018-08-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

These methods can complete the detection of weak and small targets to a certain extent, and improve a certain efficiency compared with the traditional ones, but there are still problems such as large amount of calculation and certain false alarm rate.

Method used

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  • A detection method for weak and small targets in sea and air infrared images based on complex scharr filter
  • A detection method for weak and small targets in sea and air infrared images based on complex scharr filter
  • A detection method for weak and small targets in sea and air infrared images based on complex scharr filter

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Embodiment Construction

[0069] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0070] ① Input the infrared image of the sea antenna to be detected;

[0071] ② Construct a complex Scharr filter;

[0072] ③Correlate the complex Scharr filter with the original image to obtain a complex gradient image, and perform amplitude threshold processing to obtain the points to be drawn;

[0073] ④ At the drawing point position of the new graph, draw a straight line along the length proportional to the opposite direction of the complex gradient and the amplitude, and repeat this operation until all the points to be drawn are drawn;

[0074] ⑤ For the line drawing image, perform area threshold and intersection number to eliminate interference, and take expansion operation to enhance the target;

[0075] ⑥ Obtain the position of the weak target.

[0076] In the above technical solution, the specific process of the step ② is: construct...

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Abstract

The invention discloses a method for detecting weak and small targets in sea-air infrared images based on complex Scharr filters, and belongs to the field of sea-sky environment infrared image processing and application. The present invention uses the complex Scharr filter as the filter template, and uses the template to perform correlation calculations with the infrared image to obtain the complex gradient image, draw a straight line along the reverse direction of the gradient, and perform certain post-processing on the positions with many convergence points. Obtain the infrared weak target position. The test on multiple images shows that this method improves the accuracy, reliability and operating efficiency compared with the traditional method, and it also has a better effect on difficult situations such as the fusion of the target and the background.

Description

technical field [0001] The invention relates to the field of sea-sky infrared image processing, in particular to the detection of weak and small targets. Background technique [0002] Infrared target detection technology mainly uses the infrared radiation difference between the background and the target for target recognition. Compared with the radar system, its advantages are: it belongs to passive detection, it is not interfered by electromagnetic radiation, it can detect the radar blind area in low airspace, the system is small in size and high in flexibility. Therefore, in the field of early warning monitoring and military affairs, infrared target detection has high research value. [0003] Measuring the performance of infrared target detection algorithm is mainly reflected in the detection ability of small and weak infrared targets. Taking the detection of infrared targets in the sea and sky background as an example, when the target to be detected is far away from the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T5/00
CPCG06T5/002G06T2207/10048G06T2207/20024
Inventor 燕肇一彭真明刘勇余娟杨琛安健武子豪
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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