Digital Image Watermarking Algorithm

With the development of network technology, the digital products transmitted through the Internet are easier to be modified or copied by vicious people at will without authorization. The digital watermarking technology was presented several years ago to resolve this problem. Digital image watermarking algorithms are one of the investigation hotspots in the digital watermarking techniques. This is concerned with digital image watermarking technology. The components of a digital watermarking system are discussed in detail. Advantages and disadvantages of various typical algorithms are analyzed in this paper. Two novel image watermarking algorithms in cepstrum domain for different applications are presented, namely 1-dimension cepstrum transformation image watermarking algorithm and 2-dimension cepstrum domain transformation image watermarking algorithm. These methods, used for copyright protection, demonstrate improved robustness against JPEG compression, image rotation, noising, and so on in comparison to existing algorithms. The performance of the proposed algorithms is evaluated through extensive computer simulations using various different images. Simulation results show that the proposed algorithms are robust against most watermarking attacks such as JPEG compression, image filtering and so forth. Though the author pay out mass of vigor for this technology and acquire some achievements, the digital watermarking technology based on cepstrum transformation is still on road to development. Though a mass of researches and experiments, the two image watermarking algorithms shows better robustness and more advantages.