Research And Application Of Full-blind Robust Digital Watermark Encryption Algorithm For SHP Files

Digital watermarking technology has developed rapidly since the 1990 s.From physical information hiding technology to today's application in digital products,a huge leap is realized,and it is progressing toward the integration of multiple industries.With the comprehensive development of the aerospace industry,providing conditions for China's geographic information industry,how to combine digital watermarking technology with geospatial data has become an emerging field,facing many technical problems.Geospatial vector data is a data source applied to GIS systems,and SHP files are geospatial vector data formats for a wide range of applications.The digital platform has expanded the scope of application of geospatial data day by day,and the security of geospatial vector data has become increasingly prominent.The digital watermark technology is used to provide effective protection for digital information data,and the transmission and transmission of SHP files are monitored,which plays an increasingly important role in geospatial vector data security and copyright protection.This paper will study the SHP data files of remote sensing images based on digital watermarking technology.By analyzing the characteristics of the special format of SHP file,this paper studies the applicable digital watermarking method,and makes technical improvement and innovation to realize the full blind robust watermarking technology for SHP files.The main research is as follows: through research on the information format of geospatial data,and research on digital watermarking technology applicable to geospatial information data,improve on the existing normalization algorithms,and use the maximum-min A normalized SHP full-blind robust watermarking algorithm.Based on the spatial domain watermarking algorithm,the improved digital watermarking algorithm improves the robustness against geometric attacks,and the improved algorithm has better adaptability to the characteristics of the SHP file.On the basis of studying geographic information spatial data and digital watermarking technology,the improved watermarking algorithm is applied to practical problems,and the digital watermark encryption system is completed.The watermark embedding and extraction and tracking function of remote sensing image are realized,and the image is improved.The security of data is of great significance to its copyright protection and application distribution.