Robust Data Hiding in Multimedia for Authentication and Ownership Protection

Establishing robust and blind data hiding techniques in multimedia is very importantfor authentication, ownership protection and security. The multimedia being usedmay include images, videos and 3D mesh objects.A hybrid pyramid Discrete-Wavelet-Transform (DWT) Singular-Value-Decomposition(SVD) data hiding scheme for video authentication and ownership protection is proposed.The data being hidden will be in the shape of a main color logo image watermarkand another secondary Black and White (B&W) logo image. The colorwatermark will be decomposed to Bit-Slices. A pyramid transform is performed onthe Y-frames of a video stream resulting in error images; then, a Discrete WaveletTransform (DWT) process is implemented using orthonormal lter banks on theseerror images, and the Bit-Slices watermarks are inserted in one or more of the resultingsubbands in a way that is fully controlled by the owner; then, the watermarkedvideo is reconstructed. SVD will be performed on the color watermark Bit-Slices.A secondary B&W watermark will be inserted in the main color watermark usinganother SVD process. The reconstruction was perfect without attacks, while the averageBit-Error-Rates (BER's) achieved under attacks are in the limits of 2% for thecolor watermark and 5% for the secondary watermark; meanwhile, the mean PeakSignal-to-Noise Ratio (PSNR) is 57 dB. Furthermore, a selective denoising lter toeliminate the noise in video frames is proposed; and the performance with data hidingis evaluated.Moreover, a 3D mesh blind optimized watermarking technique is proposed in thisresearch. The technique relies on the displacement process of the vertices locationsdepending on the modication of the variances of the vertices's norms. Statisticalanalysis were performed to establish the proper distributions that best t each mesh,and hence establishing the bins sizes. Experimental results showed that the approachis robust in terms of both the perceptual and the quantitative qualities.In conclusion, the degree of robustness and security of the proposed techniques areshown. Also the schemes that can be adopted to further enhance the performance,and the future work that can be done in the eld are introduced