Visible Digital Image Watermarking by Compound Mapping Algorithm

Digital images are used in almost every area of the life. The advent of digital images has brought a lot of progress to various scientific areas, but also many new threads have been opened. One of the main problems with digital data and images is unauthorized replication and use. Digital watermarking is one of the techniques for protecting copyrights of digital images by embedding the additional data to indicate the owners of the copyright. In this paper a method for visible digital image watermarking based on compound mapping algorithm is proposed. Compound mapping was used for lossless digital watermarking embedding and removing while security was improved by defining parameters of the compound mapping. Key–Words: Visible image watermarking, compound mapping, security, digital images