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:
Dec. 24, 2024
Filed:
Jun. 04, 2024
The Third Surveying and Mapping Institute of Hunan Province, Changsha, CN;
Nanjing Normal University, Nanjing, CN;
Xingxiang Jiang, Changsha, CN;
Qianwen Zhou, Huaian, CN;
Changqing Zhu, Nanjing, CN;
Hua Sun, Changsha, CN;
Luanyun Hu, Changsha, CN;
Sheng Chen, Changsha, CN;
Xi Liu, Changsha, CN;
Tan Chen, Changsha, CN;
Yujing Liu, Shaoyang, CN;
Na Ren, Nanjing, CN;
The Third Surveying and Mapping Institute of Hunan Province, Changsha, CN;
Nanjing Normal University, Nanjing, CN;
Abstract
A zero-watermarking method and device for BIM data, and a medium are provided, which relate to the field of watermarking information security technologies. Aiming at existing zero-watermarking method for the BIM data cannot resist primitive attacks, vertical stability of a model is used to construct a mapping relationship between primitive clusters and watermarking bits, calculate norms of primitives in each primitive cluster of the primitive clusters, take positivity and negativity of norm skewness measurement of the primitives as eigenvalues to construct a binary sequence, and performs an XOR process on the binary sequence and an original watermarking sequence to construct the zero-watermarking for the BIM data. Experimental results indicate that the zero-watermarking method has uniqueness, robustness and security.