The authors propose a new hybrid watermarking scheme for copyright protection of color images using contourlet transform and singular value decomposition. The host color image and color watermark images are decomposed into directional sub-bands using contourlet transform and then applied Singular value decomposition to mid frequency sub-band

Due to large amount of frames, similarity between frames and temporal attacks (frame dropping, frame averaging, frame swapping etc.), video watermarking process is more difficult than image watermarking. Current image watermarking methods are not adequate to solve these difficulties. We propose a novel uncompressed video watermarking system based on Hidden Markov Model (HMM) and Artificial Neur...

......................................................................................................................... 2 Acknowledgements ........................................................................................................ 3 1.0 Introduction .............................................................................................................. 4 1.1 Aims and Object...

In recent years, many algorithms based on HVS and DWT had been proposed for watermarking. But most of them aimed at the binary iconic watermark. So they are unsuitable for embedding other format watermarks such as the text file, the gray image or even the color image. This paper proposed a multiformat data source file supporting algorithm for watermarking and information hiding. Firstly, the al...

Medical information digitization makes the medical information storage and extraction more convenient. Medical image information security and copyright protection is also gradually being taken seriously, and some medical image watermarking has been applied. According to the characteristics of three-dimensional medical images, this paper proposes a robust zero-watermarking algorithm for medical ...