Research On Copyright Protection Of Geospatial Data Based On Robust Watermarking

In recent years,with the development of science and technology,digital products gradually into people's lives and work.Digital information storage and dissemination is very convenient,also led to the illegal use of the problem has become increasingly prominent.Therefore,how to ensure the security of digital products and copyright issues,scholars and institutions have been widespread concern.Geospatial data plays an important role in the construction of national infrastructure and geographic science.With the development of geographic information industry,the security of geospatial data becomes more prominent.As a new technology in the field of information security,digital watermarking technology can effectively protect the copyright of geospatial data without infringement,which provides a feasible solution for the security of geospatial data.This paper studies from the following aspects:(1)The significance of the research on copyright protection of geospatial data,the history of digital watermarking and the research status at home and abroad.(2)Introduces the definition,characteristics,framework,classification and main classification algorithm of digital watermarking technology,access,and geospatial data and main features of two types of structure,basic characteristics,and studies the digital geo spatial data watermarking technology application and research.(3)This paper proposes a digital watermarking algorithm for vector geo spatial data based on fast Fourier transform,the watermark information is embedded into the vector file using the algorithm,and never can sense the robustness and error of understanding,three aspects of the analysis of the experimental results.The results show that the error of watermarking data is smaller than that of raw data,and that the watermark information is non perceivable and robust against geometric attacks.(4)A remote sensing image data of digital watermarking algorithm based on discrete cosine transform and discrete wavelet transform,the watermark information is embedded into the remote sensing image using this algorithm,and never perceivability,robustness and performance of the algorithm in three aspects of the analysis of the experimental results.The experimental results show that the algorithm has good perception and can resist the normal attack of remote sensing data processing,and the performance of the algorithm is better.(5)A geo spatial data copyright protection system based on robust watermarking is designed and implemented.Each function module of the system is introduced.The system hasthe characteristics of short running time,high efficiency and simple interface.