A new multiple watermarking scheme for copyright protection and image authentication

摘要

A new multiple watermarking scheme for medical images which is based on spatial and discrete cosine transform domains is developed. In this scheme, the radiologist can specify the regions of interest to be avoided during embedding. Two watermarks are embedded where the first one is robust for ownership protection and the second one is fragile for source authentication. In order to increase data robustness, each single digit in patient's ID is encoded using an equivalent binary representation where each bit is repeated odd number of times. Different benchmarks and attacks are applied on the watermarked images to evaluate the performance of the proposed scheme. The experimental results prove the effectiveness of the scheme in terms of robustness, invisibility, integrity and source authentication.