Abstract
In this paper, we propose a region of interest (ROI) based fragile watermarking scheme for medical image tamper detection. The proposed methodology is inspired by network transmission where the transmitted message is divided into packets and redundant information is added to treat errors. In fact, the cyclic redundancy check code (CRC) is one of the most crucial error detecting checking tools used in various digital communication systems. Consequently, the region of interest to be protected is considered as a message to be transmitted without errors. Thus, the CRC code is based on a standard polynomial generator CRC-32 with more particular mathematical properties and is performed on each packet to generate a watermark to be inserted in spatial domain. At the reception end, the watermark is extracted to detect errors. Results of experiments show the validity of the proposed approach in terms of imperceptibility and efficiency to detect reliable and strong attacks.
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