New security and control protocol for VoIP based on steganography and digital watermarking （关于ip telephone security的外文资料2006年）-New security and control protocol for VoIP based on steganography and digital watermarki Vi (ip telephone on the security

Matlab source code for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital watermarking has been proposed as a viable solution to the need of copyright protection an

DIGITAL WATERMARKING

Perceptual Watermarking should take full advantage of the results from human visual system (HVS) studies. Just noticeable difference (JND), which refers to the maximum difference that the HVS does not perceive, gives us a way to model the HVS