A hybrid reversible watermarking technique for color biomedical images

In the field of medical diagnosis, exchange of information amongst various hospitals and diagnostic centres for mutual availability of diagnostic and therapeutic case studies is quite common. During digital image transportation, some information needs to be added or hidden in order to identify the owner of the data in multimedia content. EPR (electronic patient record) or hospital logo can be hidden within a bio medical image for high security instead of transferring the EPR/logo through the internet. In this present work a reversible watermarking method (Odd-Even Method) is used for watermark insertion and extraction in a bio medical image with large data hiding capacity, security as well as high watermarked quality. It can be seen that in this approach the correlation value of the original watermark and the extracted watermark is 1 and the experimental results demonstrate that, no matter how much secret data is embedded, Peak Signal-to-Noise Ratio (PSNR) is high enough which clams the robustness of the method.