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Infrared image sea-sky-line detection method based on linear lookup matrix

A sea antenna detection and infrared image technology, which is applied in image enhancement, image analysis, image data processing and other directions, can solve the problem of large amount of calculation and inappropriate, and achieve the effect of fixed calculation time, low time complexity and small amount of calculation.

Inactive Publication Date: 2016-09-07
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

The disadvantage of this method is that it is necessary to discretize the value of θ to obtain θ m , and then use trigonometric functions to calculate ρ m value, the large amount of calculation is not suitable for use in occasions with high real-time requirements

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  • Infrared image sea-sky-line detection method based on linear lookup matrix
  • Infrared image sea-sky-line detection method based on linear lookup matrix
  • Infrared image sea-sky-line detection method based on linear lookup matrix

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below according to the accompanying drawings.

[0027] figure 1 is a block diagram of a sea antenna detection method for infrared images based on a line search matrix.

[0028] figure 2 It is a 320×256 infrared medium-wave sea-sky image. The sea antenna is in the middle of the image and has a certain tilt angle. There is a ship near the sea antenna, and there is a buoy on the sea nearby.

[0029] Step 1: The sea antenna is usually an approximately horizontal straight line. In order to achieve the purpose of enhancing the sea antenna, the figure 2 Perform template operation, the template H=[-1,0,0,0,1] T , the column gradient image of the original image can be obtained, image 3 is the obtained column gradient image.

[0030] Step 2: In the column gradient image, in addition to the enhancement of the sea antenna, the ships, buoys and ripples on the water surface are al...

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Abstract

The invention discloses an infrared image sea-sky-line detection method based on a linear lookup matrix. The method comprises the steps: firstly carrying out column gradient calculation of an image in a large scale through customized template operation, and increasing the gray value of an image of a sea-sky-line region; secondly carrying out the processing of the image through employing a nonlinear segmentation method, and reducing the interference from water surface ripples and noise; finally carrying out the scanning of the image, generating the linear lookup matrix, and finding the maximum value of the matrix so as to locate the sea-sky-line position. The method is simple in implementation, is small in calculation amount, is clear and definite in physical significance, can detect horizontal and inclined sea-sky lines, and is easy to use in engineering. The test indicates that the method can effectively extract the sea-sky line in an infrared image, and has the certain anti-interference capability.

Description

Technical field: [0001] The invention belongs to the field of digital image processing and detection, in particular to an infrared image sea antenna detection method based on a straight line search matrix. Background technique: [0002] In the shipborne infrared target search and track system, sea antenna detection is an important part of infrared target detection and tracking. On the one hand, identifying the sea antenna can narrow down the area of ​​target search. After obtaining the location information of the sea antenna, you can only search the area near the sea antenna, reduce the amount of calculation, and ensure the real-time performance of the system. On the other hand, after the sea antenna is detected, unnecessary interference information outside the area of ​​the sea antenna can be eliminated, the error rate of target detection can be reduced, and the accuracy of target detection can be improved. [0003] The sea antenna is between the sky and the ocean, and th...

Claims

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T7/0002G06T2207/10048G06T2207/30181
Inventor 刘士建李范鸣吴滢跃高波张涌
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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