Digital Video Watermarking Using Dwt and Pca

Digital Watermarking may be a technology used for the copyright protection of digital applications. During this paper, a comprehensive approach for watermarking digital video is introduced, and a hybrid digital video watermarking scheme based on Discrete Wavelet Transform (DWT) and Principal Component Analysis (PCA). PCA helps in reducing correlation among the wavelet coefficients obtained from wavelet decomposition of each video frame thereby dispersing the watermark bits into the uncorrelated coefficients. The video frames are first decompose using DWT and also the binary watermark is embedded in the principal components of the low frequency wavelet coefficients. An imperceptible high bit rate watermark embedded is robust against various attacks that will be carried out on the watermarked video, like filtering, geometric attacks and contrast adjustment.