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Image-based ship snapshot method and system

A ship and image technology, which is applied in the image-based ship capture method and system field, can solve the problems of incapability of capture and inconvenience of staff, and achieve the effect of solving the problem of inability to capture, reducing complexity, and high capture accuracy

Pending Publication Date: 2022-04-12
HUNAN NOVASKY ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of calculating the capture angle based on the longitude and latitude reported by AIS, on the one hand, it is necessary to set a reference point on the water surface, which brings great inconvenience to the staff;

Method used

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  • Image-based ship snapshot method and system
  • Image-based ship snapshot method and system
  • Image-based ship snapshot method and system

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Such as figure 1 As shown, the image-based ship capture method of the embodiment of the present invention is implemented based on a detection camera and a capture camera, wherein the detection camera and the capture camera are installed in the waters to be observed, and the method specifically includes the following steps:

[0047] 1) Obtain the internal parameters of the capture camera and the initial external parameters of the capture camera;

[0048] 2) Collect the detection camera and capture camera images, and estimate the mapping matrix H between the two cameras;

[0049] 3) Use the target detection algorithm after training to predict the position and size of the rectangular frame of the ship in the detection image;

[0050] 4) According to the mapping matrix, the rectangular frame of the ship in the detection camera is mapped to...

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Abstract

The invention discloses an image-based ship snapshot method and system, belongs to the technical field of ship snapshot, and is used for solving the technical problems that the current ship snapshot operation is complicated and depends on an AIS (Automatic Identification System), and the method comprises the following steps: 1) obtaining an internal parameter and an initial external parameter of a snapshot camera; 2) acquiring images of the detection camera and the snapshot camera, and estimating a mapping matrix H between the detection camera and the snapshot camera; 3) predicting the position and size of the ship in the rectangular frame in the detection image; 4) mapping the ship rectangular frame in the detection camera to a snapshot camera according to the mapping matrix; and 5) calculating azimuth parameters and magnification times of alignment of the center of the snapshot camera to the ship, and then carrying out snapshot on the ship. The method has the advantages of simple operation, high snapshot accuracy and the like.

Description

technical field [0001] The present invention mainly relates to the technical field of ship capture, in particular to an image-based ship capture method and system. Background technique [0002] With the frequent occurrence of illegal incidents such as overloading of ships on the water, people not marking or covering the name of the ship according to the regulations, the method of manual capture is insufficient. This method is inefficient in law enforcement and wastes a lot of human resources. At present, the water intelligent traffic bayonet capture system locates and captures ships based on the longitude and latitude information reported by AIS (Automatic Ship Identification System), such as the invention of "A Ship Positioning and Capture Method Based on AIS and Image Analysis Auxiliary", which uses AIS to report Calculate the longitude and latitude of the ship and the azimuth angle of the camera position. With the help of the latitude and longitude value of the reference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V10/25G06V10/24G06V10/28G06T7/80G06T7/136H04N5/232H04N5/247H04N23/90
Inventor 吴冉冉何鑫韩乃军姚敏江李飞
Owner HUNAN NOVASKY ELECTRONICS TECH
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