Abstract
Given the ease of alteration of digital data, integrity verification and tamper detection for medical images are becoming ever more important. In this paper, instead of using the conventional irreversible block-based watermarking approach to achieve tamper localization, we propose to incorporate such functionality into the region-based lossless watermarking scheme. This is achieved by partitioning an image into certain non-overlapping regions and appending the associated local authentication information directly into the watermark payload. A region of authentication, which can be flexibly specified by the user, is partitioned into small regions in a multilevel hierarchical manner. Such hierarchical structure allows the user to easily adjust the localization accuracy, and makes the tamper detection efficient. Experimental results demonstrate the effectiveness of tamper localization.
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Guo, X., Zhuang, Tg. Lossless Watermarking for Verifying the Integrity of Medical Images with Tamper Localization. J Digit Imaging 22, 620–628 (2009). https://doi.org/10.1007/s10278-008-9120-5
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DOI: https://doi.org/10.1007/s10278-008-9120-5