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Infrared image sea-sky-line detection algorithm based on line gradient accumulation

A sea-antenna detection and infrared image technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve the problems of low signal-to-noise ratio and multi-interference, and unsatisfactory effects

Active Publication Date: 2016-07-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Like the line scan method, it is not ideal for low signal-to-noise ratio and multiple interference

Method used

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  • Infrared image sea-sky-line detection algorithm based on line gradient accumulation
  • Infrared image sea-sky-line detection algorithm based on line gradient accumulation
  • Infrared image sea-sky-line detection algorithm based on line gradient accumulation

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0066] ① Input the preprocessed sea antenna infrared image to be detected;

[0067] ② Calculate the row gradient;

[0068] ③ Calculate the line gradient sum, and select several peaks from them, and record the number of lines where they are located, as the candidate position of the sea antenna;

[0069] ④ Select the position of the candidate sea antenna in turn, and calculate the difference between the average gray value and the average line gradient of the area above and below the candidate sea antenna;

[0070] ⑤ Create an evaluation function, synthesize the known data, and obtain the position of the sea antenna through comprehensive evaluation;

[0071] ⑥ Output the sea antenna position information to the original image.

[0072] In the present invention, the specific process of step ② is: read in the infrared image preprocessed by ①, and ...

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Abstract

The invention discloses an infrared image sea-sky-line detection algorithm based on line gradient accumulation, which belongs to the field of sea-sky environment infrared image processing and application. Line image gradients serve as a basis, the traditional line scanning sea-sky-line extraction algorithm is combined, a line gradient sum is solved, absolute value processing is not carried out, sea-sky area features such as an area average gray level difference and an area average line gradient difference are further calculated in candidate peak values, the data are integrated and thus sea-sky-line judgment can be carried out. When the sea sky line is obtained, the structure of an original image can be known preliminarily, the calculation amount of subsequent processing such as image segmentation and ship recognition is greatly reduced, and analysis and practical application are facilitated. Through testing multiple images, compared with the traditional method, the method of the invention improves the accuracy, the reliability and the operation efficiency.

Description

technical field [0001] The invention relates to the field of infrared sea-sky image detection, in particular to automatic sea-sky detection. Background technique [0002] In the ship recognition system under the background of sea and sky, sea antenna detection is an important link in the recognition and tracking of ship targets in infrared images. On the one hand, the original image has a wide imaging range. If the approximate range of the ship target is not initially determined, the efficiency of target recognition will be greatly reduced. According to experience, when the ship is at a relatively long distance (greater than 6 kilometers), the original image can be divided into three regions: the sky, the sea line, and the sea surface. The detection of the sea antenna can roughly distinguish these three areas. After obtaining the position information of the sea antenna, only the area near the sea antenna needs to be detected, which reduces the amount of computation. On the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/40
CPCG06T2207/10048
Inventor 燕肇一彭真明罗宽怀杨维王浩正黄少寅汪劲希
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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