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Ship speed detection method based on visible light remote-sensing images

A remote sensing image and speed detection technology, applied in the field of image processing, can solve problems such as high cost and complex structure, and achieve the effects of strong real-time performance, high measurement result accuracy, and wide application range.

Inactive Publication Date: 2013-12-11
XIDIAN UNIV
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Problems solved by technology

The present invention makes full use of the ship wake information in the visible light remote sensing image, and combines the ship wake gray value matrix with the difference function to realize ship speed detection, so as to solve the problem of complex ship external devices in the prior art. The problem of complex structure and high cost

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  • Ship speed detection method based on visible light remote-sensing images
  • Ship speed detection method based on visible light remote-sensing images
  • Ship speed detection method based on visible light remote-sensing images

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] Refer to attached figure 1 , the measurement steps of the present invention are as follows.

[0035] Step 1. Obtain visible light remote sensing images.

[0036] The computer reads a visible light remote sensing image data taken by a remote sensing satellite.

[0037] The MATLAB software in the computer stores the visible light remote sensing image in the computer memory in the form of a p(N, M) matrix, where N and M represent the number of pixels in the horizontal and vertical directions of the visible light remote sensing image, respectively.

[0038] Step 2, preprocessing the image.

[0039] The steps for enhancing the visible light remote sensing image are: take a window with a size of 3*3 and slide it on the visible light remote sensing image, and compare the average pixel value of all pixels in the window with the pixel value of the pixel at t...

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Abstract

The invention discloses a ship speed detection method based on visible light remote-sensing images. According to the method, the speed of a ship is detected through the visible light remote-sensing images. The method includes the implementation steps of (1) acquiring the visible light remote-sensing images, (2) preprocessing the images, (3) acquiring a gray value matrix of the wake of the ship, (4) acquiring the frequency period of the wake of the ship, (5) detecting the speed of the ship, and (6) outputting the speed of the ship by a computer. By utilizing the corresponding relation between the frequency period of the wake of the ship and the speed of the ship, the speed of the ship is acquired with the method of combining the ship wake gray value matrix extraction and minimization calculation. The ship speed detection method based on the visible light remote-sensing images can be used for monitoring speed of ships in the marine monitoring field, and can improve the detection accuracy of speed of ships, lower system complexity and promote real time performance.

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to a ship speed detection method based on visible light remote sensing images. The invention can be used for monitoring the speed of ships in the field of marine monitoring. Background technique [0002] At present, in the field of ship speed detection, it is mainly realized by using external devices such as additional sensors and image detection. The first method using additional sensors is done by means of devices such as spiral sensors, electromagnetic sensors or semiconductor pressure sensors. The second image detection method is to use SAR satellite images, GPS locator measurement or sound intensity vector measurement to complete the ship speed estimation. [0003] Tongji University disclosed a method of obtaining the speed of a ship through a brushless DC motor ship in its patent application "A method and device for measuring the speed of a brushless DC motor ...

Claims

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Application Information

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IPC IPC(8): G01P3/36
Inventor 王晓蕊曾蕾余华欣刘德莲黄曦郭苗苗张建奇
Owner XIDIAN UNIV
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