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Infrared image sea-sky-line self adaption detection method

An adaptive detection, infrared image technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of difficult to obtain satisfactory extraction effect, difficult to determine the best threshold, poor anti-noise ability, etc., to achieve easy real-time implementation , The algorithm calculation amount is small, and the effect of avoiding noise interference

Active Publication Date: 2015-01-07
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

The existing sea-antenna detection technology has the following disadvantages: (1) Under certain complex background conditions, the straight line fitting method is difficult to obtain satisfactory extraction results due to the interference of sea clutter, sunlight, clouds and other natural backgrounds; (2) ) Hough transform detects straight lines, which are easily disturbed by clouds in the sky and form false contours; (3) Otsu threshold segmentation method has poor anti-noise ability, and it is not easy to determine the optimal threshold; (4) The method based on wavelet transform, that is, using different scales The lower wavelet coefficient suppresses the background and extracts the edge, but the detection efficiency is not high

Method used

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  • Infrared image sea-sky-line self adaption detection method
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  • Infrared image sea-sky-line self adaption detection method

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Embodiment 1

[0052] combine figure 1 In the following, an example is used to illustrate a sea-antenna self-adaptive detection method of an infrared image according to the present invention. The number of pixels of the infrared image is 320×256, and the frame rate is 50HZ. The digital signal of the infrared thermal imager is transmitted to the special image processing board of the DSP+FPGA architecture through the optical fiber, and the sea antenna adaptive detection method of the infrared image is realized in the DSP processor, and the processing time is less than 20ms, which meets the needs of real-time processing. The specific implementation Proceed as follows:

[0053] (1) Obtain the original infrared image F org ;

[0054] Raw infrared image F org It is a 14-bit digital image. The digital signal of the infrared thermal imager is transmitted to the FPGA of the special image processing board through optical fiber packaging, and the FPGA completes the optical fiber unpacking and tran...

Embodiment 2

[0072] In Figure 3, Figure 3a Indicates the sea antenna detection results in a simple background, Figure 3b Indicates the sea antenna detection results in complex backgrounds. The image display and data simulation show that the detection accuracy of the sea antenna adaptive detection method proposed by the present invention is plus or minus 1 pixel, and the detection accuracy of the sea antenna is high.

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Abstract

The invention discloses an infrared image sea-sky-line self adaption detection method which includes the following steps that (1) an original infrared image Forg is obtained; (2) edge detection is conducted on the original infrared image through a Canny operator, and an edge image Fedge is obtained; (3) a sliding window model MWin, the sea-sky-line length and a model LEN sum <j> are built; (4) full-figure traversal is conducted on the edge image Fedge through the sliding window model MWin, and the sum of lengths of sea-sky-lines of different lines is solved; (5) the length of the sea-sky-lines and the line with the maximum LEN sum are defined to be the positions of the current image sea-sky-lines; (6) smoothing is conducted on the current image sea-sky-lines, and the filter value Lineseasky <p+1> of the p+1th frame of the sea-sky-lines is output.

Description

technical field [0001] The invention relates to the field of infrared image processing, in particular to an infrared image sea-antenna self-adaptive detection method suitable for real-time realization of infrared hardware. Background technique [0002] Sea antenna detection is a key link in ship target detection on the sea surface. Especially when the infrared detector has a long imaging distance, affected by the humid atmosphere on the sea surface, the infrared radiation of the ship target is severely attenuated, and it appears as a weak target in the image. Difficulty of boat detection and localization. However, after the anti-ship missile is launched, the flight altitude is relatively low, coupled with the influence of the curvature of the earth, if the surface ship target appears in the detector's field of view, it must be located in the vicinity of the sea antenna. Based on this prior condition, if the sea antenna can be accurately located, the influence of sea clutter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/13G06T2207/10048G06T2207/30181
Inventor 白俊奇赵春光王寿峰郑坚茅宁杰
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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