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The growth of the digital multimedia technology and development of the internet allow people to process, deliver and store information more easily. Digital images can be easily captured by digital cameras and due to ease of network connectivity, the access and sharing of images has become extremely feasible and convenient. Copyright protection of these images can be done by using digital image watermarking, watermarking is embedding a identification logo into cover image for its protection. Most of the existing image watermarking techniques is implemented for grey scale images, in this book...

This book describes the design, development, and testing of a novel digital watermarking technique for color images using Magic Square and Ridgelet transforms. The novel feature of the method is that it generates and uses multiple copies of the digital watermark. The book describes how the method was tested for embedding digital watermarks into color cover images, resulting in very high PSNR value and yielding comparable results with existing watermarking techniques.To reach this new method, eight different techniques are designed, developed and tested. First, the authors test two digital...

This work presents a review of different indexing techniques designed to enhance the speed and efficiency of searches over large biometric databases.