Sign identification method based on fixed features

Abstract

The invention discloses a sign identification method based on fixed features. The method comprises the following steps: A, performing image preprocessing on images of a primary camera and a secondary camera; B, performing left and right image point coupling; C, performing image plane constant feature identification; and D, performing image space model coupling congruence identification. According to the invention, in accordance with constant features of a sign system, through the image plane constant feature identification, image plane prediction identification and the image space model coupling identification, parasitic light points are reliably eliminated and identification of each sign is completed.

Description

technical field [0001] The invention relates to the field of sign recognition, in particular to a sign recognition method based on fixed features. Background technique [0002] Space rendezvous and docking is the prerequisite for realizing space operations such as on-orbit assembly, maintenance, supply and space recovery of large spacecraft such as space stations, and is of great significance for the development of space technology and the utilization of space resources. In the process of space rendezvous and docking, the radiation and reflection of various celestial bodies such as the sun and the moon, as well as the components on the aircraft will affect the imaging of the camera, forming a large amount of stray light interference. In foreign countries, the collinear feature of the sign system is used to identify signs. However, since its sign system is composed of four corner reflectors, three of which are on a straight line, when any sign, especially a sign that is not o...

AI Technical Summary

Problems solved by technology

In foreign countries, the collinear feature of the sign system is used to identify signs. However, since its sign system is composed of four corner reflectors, three of which are on a straight line, when any sign, especially a sign that is not on a straight line determined by three points When there is a light point in the accessory, there may be a recognition error, so that the correct measurement result cannot be obtained

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