The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2024
Filed:
Mar. 20, 2024
Lanzhou Jiaotong University, Gansu, CN;
Haowen Yan, Gansu, CN;
Liming Zhang, Gansu, CN;
Jingzhong Li, Gansu, CN;
Xiaomin Lu, Gansu, CN;
Weifang Yang, Gansu, CN;
Pengbin Wang, Gansu, CN;
Ziyi Zhang, Gansu, CN;
LANZHOU JIAOTONG UNIVERSITY, Lanzhou, CN;
Abstract
The disclosure provides a reversible watermarking method for the oblique photography three-dimensional models with controllable accuracy. According to the disclosure: firstly, by using the global stability of the average included angle of vertex normal vector, the feature points of the oblique photography three-dimensional model are extracted; secondly, the mapping relationship is established by the ratio of the distance between feature points and non-feature points, and the vertexes are grouped, and each group consists of a feature point corresponding to several non-feature points; finally, the spherical coordinate system is constructed by taking the feature points as the coordinate origin in grouping, and the watermark is embedded by modifying the radius of the coordinate system.