Research And Application In Image Integrity Protection

Security problems of digital image are a major problem in multimedia content protection. Research in digital watermark is a fast developed area which combines theories and thoughts in several different areas. Digital watermark has the character of imperceptibility, robustness, lossless and testability. It provides the possibility and actually is an excellent way in achieving the integrity and creditability protection of digital contents as well as information security protection based on network environment.This context firstly introduced the foundation, classification, research status and application areas of digital watermark in the aspects of inreversible and reversible watermark. Then it theoretically introduced two kinds of inreversible watermarks which are watermarks based on Singular Value Decomposition, watermarks based on HSB and LSB and two kinds of reversible digital watermarks which are watermark based on Reversible Integer Transform, watermark based on lossless compression and ECC check. Then it gave detailed description of the flow design and experiment both in embedding end and checking end for watermarks based on Singular Value Decomposition and watermark based on Reversible Integer Transform. Besides, This context also analyzed the data got in the simulation experiment in ideal status. At last, this context introduced Plane Media Transmission System and the actual implementation of digital watermark in this system. We mainly did application experiment on watermark based on Singular Value Decomposition and on watermark based on Reversible Integer Transform. Experiment results showed that not all kinds of watermark can be put use into this system and the analysis of the reason is also given.