Watermarking Hiding Techniques

Digital, works arc subject to illicit copying and distribution. Many owners wish for some means of identifying ownership and copyright. Digital watermarks can fulfill this role and provide a means to identify and track digital works. However, embedded watermarks may fail to be recognized due to attack by cropping or distortions such as smoothing, rotation and scaling. Good techniques were proposed to embedding watermarking in still images and many previously techniques were improved to increasing the robustness against attack, which provide copyright protection. When watermarking image exposed to attack can guarantee one or more watermark remain without distortion. The following methods of hiding watermark are suggested and implemented: Improved LSB (which consist of two methods “ LSB cloud” and “Improved Butterfly method ), GIF Change Local Palette, JPEG method (consist of two methods “Before Quantization method” and “After Quantization method).To ensure watermark is hiding in image, we apply the extraction process to extract the watermark from image