02-09-2017, 11:37 AM
Due to the extensive use of digital media applications, multimedia security and copyright protection have acquired tremendous importance. Digital Watermarking is a technology used for copyright protection of digital applications. In this work, a comprehensive approach is introduced for the digital video watermark. We propose a hybrid digital video watermark scheme based on Discrete Wavelet Transformation (DWT) and Principal Component Analysis (PCA). PCA helps to reduce the correlation between the wavelet coefficients obtained from the wavelet decomposition of each video frame, thus dispersing the watermark bits in the uncorrelated coefficients. The video frames are first decomposed using DWT and the binary watermark is embedded in the main components of the low-frequency wave coefficients. The embedded high bit rate imperceptible watermark is robust against several attacks that can be performed on watermarked video, such as filtering, contrast tuning, noise addition, and geometric attacks.
The popularity of digital video-based applications is accompanied by the need for copyright protection to prevent illicit copying and distribution of digital video. Copyright protection inserts authentication data such as proprietary information and the logo into digital media without affecting its quality of perception. In case of any dispute, the authentication data is extracted from the media and can be used as proof authorized to demonstrate ownership. As a method of copyright protection, digital video watermarking has recently emerged as a field of significant interest and a very active area of research. The watermark is the process that incorporates data called watermark or digital signature into a multimedia object so that the watermark can be detected or extracted later to make a statement about the object. The object can be an image or audio or video. For the purposes of copyright protection, digital watermarking techniques must meet the criteria of imperceptibility and robustness against all attacks to eliminate the watermark.
The popularity of digital video-based applications is accompanied by the need for copyright protection to prevent illicit copying and distribution of digital video. Copyright protection inserts authentication data such as proprietary information and the logo into digital media without affecting its quality of perception. In case of any dispute, the authentication data is extracted from the media and can be used as proof authorized to demonstrate ownership. As a method of copyright protection, digital video watermarking has recently emerged as a field of significant interest and a very active area of research. The watermark is the process that incorporates data called watermark or digital signature into a multimedia object so that the watermark can be detected or extracted later to make a statement about the object. The object can be an image or audio or video. For the purposes of copyright protection, digital watermarking techniques must meet the criteria of imperceptibility and robustness against all attacks to eliminate the watermark.