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Reference network assisted satellite image high-precision positioning method and device

A satellite image and positioning method technology, applied in the field of satellite image processing, can solve the problems of complex positioning process, limited positioning accuracy, and inapplicability of high-precision geometric positioning, and achieve the effect of simplifying the positioning process

Active Publication Date: 2021-11-02
DAODATIANJI SOFTWARE TECH BEIJING
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Problems solved by technology

Among them, based on the field control point method, the positioning accuracy is limited by the distribution of control points, and the operation cost in large areas is too high, which is suitable for high-precision geometric positioning in small areas; the principle based on the reference DOM and DEM mode is similar to that based on the control point image library mode. The control data comes from the results of different resolutions in different projects, and the reference accuracy is unreliable, which is only suitable for small-scale emergency or temporary operations
[0003] The geometric positioning of satellite images in the prior art is not suitable for high-precision geometric positioning of large areas, and the positioning process is complicated

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  • Reference network assisted satellite image high-precision positioning method and device
  • Reference network assisted satellite image high-precision positioning method and device
  • Reference network assisted satellite image high-precision positioning method and device

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[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of the embodiments of the present disclosure, but not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

[0048] In addition, the term "and / or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which may mean: A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character " / " in this article ...

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Abstract

The embodiment of the invention provides a reference network assisted satellite image high-precision positioning method and device. The method comprises the following steps: acquiring a satellite image to be processed; extracting Harris feature points of the satellite image to be processed, and determining positioning points according to response values of the Harris feature points; processing the corresponding regional image blocks according to the positioning points, and determining homonymy feature points; and adjusting the satellite image to be processed by using a pre-established reference network image corresponding to the satellite image to be processed based on the homonymy feature points. Thus, the positioning process can be simplified, and the method is suitable for large-area high-precision geometric positioning.

Description

technical field [0001] Embodiments of the present disclosure generally relate to the technical field of satellite image processing, and more specifically, relate to a reference network-assisted satellite image high-precision positioning method and device. Background technique [0002] In the prior art, the auxiliary data relied on for positioning after image matching in satellite image geometric positioning mainly includes field control points, reference DOM and DEM, and control point image libraries. Among them, based on the field control point method, the positioning accuracy is limited by the distribution of control points, and the operation cost in large areas is too high, which is suitable for high-precision geometric positioning in small areas; the principle based on the reference DOM and DEM mode is similar to that based on the control point image library mode. The control data comes from the results of different resolutions in different projects, and the reference ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42G01S19/01
CPCG01S19/42G01S19/01
Inventor 梁斯东张丽莎刘建明张宝玉
Owner DAODATIANJI SOFTWARE TECH BEIJING
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