Deciding meaningful number of shares in digital watermarking scheme for secret images

With the growth in digital world, it is becoming more important to find a method to protect the security of digital media. An image watermarking model based on progressive visual cryptography is proposed to decide optimal number of shares. A study on implementation of meaningful shares in combination with visual cryptography scheme for secret images is carried out for implementation of algorithm. A visual cryptography techniques are used to create meaningful shares. We had used different algorithms to generate meaningful shares. These shares are watermarked with cover images. After transmission of these watermarked images to receiving end, the receiving end will extract the shares from watermarked images and stacking of these extracted meaningful shares will generate the original secret image. Combination of Digital watermarking and visual cryptography adds enhanced security to secret images.