A Research On Blind Watermarking Technique Of Three Dimensional Motion

Digital watermarking tecndque is a new research area of multimediacomrnunication and multimedia signal processing in recentIy years. It's widelyinvestigated and used as an effective way for boowledge property right protection. 3Dmotions, as a new multimedia cofltent type, have become a hotspot of computeranimation research, and also have broad aPplication prospect in movie. game'control. simu1ation field etc. This paPer discusses typical multimedia watermarkingalgorithms. theory and technique related with 3D motion. By comparing andanalyzing the existent watermarking algorithms, it proposes two robust watermarkingalgorithms f a 3D motion blind watermark detection algorithIn and a 3D motion bIindwatermark extTaction algorithIn.The chaPter 1 surveys the popular tec[mque of muhimedia watermarkng,introduces the basis of digital watermark, explains its definition. background.perfOrmance indicator. classification and aPplication field, illustrates a general digitalwatermarking system. It emphasized on the analysis and evaluation of typicalwatermarking algorithIns. It classifies and discusses the attack of watermarking,introduces the aPplication of digital watermarking tecboque in industry.In the chaPter 2, it summarizes the theory and technique of 3D motion and motionsignaI processing. It addresses the theory of character modeling' motionrepresentation. Then analyzes and cornmeflt on the typical ways of 3D motioncreation, including motion caPtllfe' motion pictUre sequence tracking. kinematics anddynamics. lt introduces the basis of motion signal processing, and finally is ourmotion data viewer program based on OpenGL.Based on the theoTy of statistical dctection and research on distribution of DCTcoefficiefits, the chaPter 3 proposes a robust 3D motion blind watermark detectionalgorithIn, which is a sign correlation detection scheme. Experimental results showthat this method is resilience to many attacks such as Gaussian White Noise.resaxnpling. smoothing and second watermark.In chaPter 4, it implemented a robust 3D motion blind watermark extractionalgorithm. The algorithIn adopts twO well-known ideas called spread spectrum andquantization, first applies a frequency transfOrmation on the motion signal, and thenembeds watermark bits by quantizing proper intermediate frequency coefficients. Ourexperiments show that this method is also robust to Gaussian White Noise.resampling and smoothing etc..At last, some discussions and conclusions are given.