Changqing Zhu

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Nanjing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Zero-watermarking method and device for BIM data, and medium
- Patent number 12,174,923
- Issue date Dec 24, 2024
- The Third Surveying and Mapping Institute of Hunan Province
- Xingxiang Jiang
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Dual watermarking method for trajectory data based on robust waterm...
- Patent number 12,131,401
- Issue date Oct 29, 2024
- NANJING NORMAL UNIVERSITY
- Na Ren
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Watermarking method for high-definition map based on invisible char...
- Patent number 12,014,440
- Issue date Jun 18, 2024
- NANJING NORMAL UNIVERSITY
- Na Ren
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Generation method, detection method, generation device, and detecti...
- Patent number 11,983,789
- Issue date May 14, 2024
- NANJING NORMAL UNIVERSITY
- Na Ren
- G06 - COMPUTING CALCULATING COUNTING