Nanjing Normal University

The Third Surveying and Mapping Institute of Hunan Province

Luanyun Hu

Changqing Zhu

Na Ren

Qianwen Zhou

Sheng Chen

Tan Chen

Hua Sun

Xingxiang Jiang

Yujing Liu

Xi Liu

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.

Zero-watermarking method and device for BIM data, and medium

Growing community of inventors

Changsha, China

Luanyun Hu