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...

Examples

Embodiment Construction

[0014] The present invention will be further described below in conjunction with drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some parts related to the present invention are shown in the accompanying drawings but not the whole content. Unless otherwise defined, all technical and scientific terms used herein are related to the technology belonging to the present invention. Those skilled in the art usually understand the same meaning. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0015] Please refer to figure 1 as sh...

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...

Examples

Embodiment Construction

[0014] The present invention will be further described below in conjunction with drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some parts related to the present invention are shown in the accompanying drawings but not the whole content. Unless otherwise defined, all technical and scientific terms used herein are related to the technology belonging to the present invention. Those skilled in the art usually understand the same meaning. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0015] Please refer to figure 1 as sh...

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