DIGITAL IMAGE PROTECTION AND SELF-RECOVERY USING WATERMARK ALGORITHM

Expansion of the Internet has increased the availability of digital data such as audio, images and videos to the public. Watermarking is a method for inserting the watermark information into an image, which is to be later used for inventing tampered region and recovering the lost data in the tampered zone. The main reason for developing digital watermarking research is to protect intellectual properties of the digital world. Watermarking techniques may divide on the basis of domain like spatial domain or transform domain or on the basis of wavelets. The spatial domain techniques work on the pixels and the frequency domain works on the transform coefficients of the image.