Efficient Dual Domain Watermarking Scheme for Secure Images

Day to day growth of multimedia technology draws great attention for security. Digital images can be easily altered with software. This problems demand copyright protection and ownership verification. Digital watermarking is proposed as one of the ways to accomplish this, in which Digital watermarks are generally embedded into digital images in a manner that make the watermark invisible to a human observer as such watermarks do not cause degradation in the visual quality, or in the usefulness of the images. Digital watermarking is a technique to insert owner´s identity into images for authentication. Digital watermarking has emerged as a new area of research for the Intellectual Property (IP) protection of images. Spatial domain watermarking has advantage of less computational cost. Frequency domain watermarking provides more robustness. The proposed algorithm has been developed to take advantage of both spatial as well as frequency domain properties.