Qianwen Zhou

Title: Innovations of Qianwen Zhou in Watermarking Technologies

Introduction

Qianwen Zhou is a notable inventor based in Huai'an, China. He has made significant contributions to the field of watermarking information security technologies, holding a total of four patents. His work focuses on developing methods that enhance the security and robustness of data.

Latest Patents

One of his latest patents is a zero-watermarking method and device for Building Information Modeling (BIM) data. This innovation addresses the limitations of existing zero-watermarking methods that are vulnerable to primitive attacks. By utilizing the vertical stability of a model, Zhou constructs a mapping relationship between primitive clusters and watermarking bits. He calculates norms of primitives within each cluster and uses the positivity and negativity of norm skewness measurements as eigenvalues to create a binary sequence. This sequence undergoes an XOR process with an original watermarking sequence to establish the zero-watermarking for BIM data. Experimental results demonstrate that this method possesses uniqueness, robustness, and security.

Another significant patent is a dual watermarking method for trajectory data, which combines robust and fragile watermarking techniques. This method employs an encryption algorithm to create robust watermark information. It identifies a farthest pair of feature points within a minimum convex hull as constant points. The technology further utilizes quantization index modulation to embed robust watermark information into angles formed by feature points and constant points. The method ensures that the spatiotemporal attributes of trajectory points are embedded as fragile watermark bits within the distance ratios constructed by these points. The watermark detection process aligns with the embedding of watermark information, providing high robustness against translation, rotation, and scaling attacks.

Career Highlights

Qianwen Zhou has worked at Nanjing Normal University and the Third Surveying and Mapping Institute of Hunan Province. His experience in these institutions has contributed to his expertise in watermarking technologies and data security.

Collaborations

Some of his notable coworkers include Na Ren and Changqing Zhu, who have collaborated with him on various projects related to watermarking and data security.

Conclusion

Qianwen Zhou's innovative work in watermarking technologies has significantly advanced the field of information security. His patents reflect a commitment to enhancing data protection methods, showcasing his expertise and dedication to innovation.