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Offshore mobile platform tracking identification method based on vision

A mobile platform and identification method technology, applied in the field of vision-based tracking and identification of offshore mobile platforms, can solve problems such as difficulties in identifying platforms, and achieve the effects of simple algorithm structure, low computing power required for operation, and low programming difficulty

Pending Publication Date: 2021-08-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

[0003] When an aircraft pilot lands on a mobile platform on the sea, even if the general orientation is obtained from the sensor, he often needs to visually adjust the orientation of the platform to adjust the aircraft. However, it is often difficult to quickly identify the platform on the vast sea

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  • Offshore mobile platform tracking identification method based on vision
  • Offshore mobile platform tracking identification method based on vision
  • Offshore mobile platform tracking identification method based on vision

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Embodiment Construction

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

[0034] In the present invention, the offshore mobile platform (hereinafter referred to as the mobile platform) is framed and displayed on the Hud (Head Up Display) display screen, and a corresponding algorithm is designed to solve the relative position and attitude information of the mobile platform and the aircraft at this time according to the image. Auxiliary pilot to fly.

[0035] The identification strategy of the mobile platform of the present invention is: when the aircraft enters the landing process during the approach process, the platform identification program will be started to identify the mobile platform in the field of vision. The recognition method is to extract and match the feature points of the initial template picture (the image is obtained when the mobile platform is shot at close range, contains more image detail...

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Abstract

The invention discloses an offshore mobile platform tracking identification method based on vision. The method comprises the following steps: (1) preprocessing a platform image; (2) judging a preparation key point; (3) solving a response maximum value point; (4) describing feature points; (5) carrying out feature point matching on the airborne camera picture and the template picture stored in the airborne computer; drawing a rectangular frame of the platform position according to the distribution of the points; (6) carrying out Hough straight line extraction on the rectangular frame image to obtain coordinates of four end points of the runway in a picture shot by the camera; and (7) according to the coordinates of the four endpoints of the runway in the two-dimensional picture and the three-dimensional system, solving the relative position and pose relationship between the fixed-wing aircraft and the platform by adopting a PNP algorithm. The characteristic that the visual sensor is rich in visual information is utilized, the feature point extraction and matching algorithm is adopted, the relative position and attitude information of the aircraft and the offshore platform can be rapidly calculated, and landing of a pilot is assisted.

Description

technical field [0001] The invention relates to a tracking and identifying method for an offshore mobile platform, in particular to a vision-based tracking and identifying method for an offshore mobile platform. Background technique [0002] Computer vision is a product of interdisciplinary subjects such as optics, computer science, and bionics. It is a passive source of information that contains rich information. Using computer vision information to realize autonomous navigation of aircraft has become a research hotspot. The computer vision navigation of the aircraft uses the real-time images captured by the onboard camera as the source of navigation information, and calculates the real-time motion parameters of the carrier through a series of processing, and then provides the required navigation parameters for the control system. The camera is a relatively low-cost information source, and can provide a wealth of environmental information at the same time. The autonomous na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/136G06T7/73G06T5/00
CPCG06T7/0002G06T7/136G06T7/73G06T2207/10024G06T2207/20021G06T2207/20032G06T5/70
Inventor 阴浩博刘亮赵启江驹
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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