Halftone Visual Cryptography & Watermarking

R.Charanya, T. Vijayan Abstract: In this Paper, a method of Information hiding & Piracy protection in Image processing is discussed. Visual cryptography & Digital watermarking helps in enables Information hiding, copyright & piracy protection. Here, a technique involving halftone visual cryptography along with watermarking is proposed to achieve visual cryptography via half toning. Digital watermarking is then performed to this halftone image. This ensures that the merits of both visual cryptography and watermarking are achieved. For visual cryptography, binary images are used for content protection. Here the image is spilt into shares which are randomly transmitted and then by means of visual decoding of information shares which are transmitted. From this process meaningful information is obtained. Watermarking is an information hiding technique. The image or watermark is embed in the already obtained halftone image. Half-toning is done using the dithering algorithm.