Considering the existing medical image watermarking algorithms, a single function often has limitations, and a multipurpose watermarking algorithm for medical images is proposed. First, medical images are divided into regions of interest (ROIs) and regions of noninterest (RONIs). Then, the authentication watermark produced for each subblock of the ROI is embedded into the corresponding mapping subblock. The visible watermark is embedded into the RONI, and, finally, the watermark information and constructed authentication information in each subblock of the ROI are embedded into the corresponding RONI subblock. Simulation results show that the embedded visible watermark can protect and facilitate medical image management. In addition, the proposed algorithm has strong robustness and very good visual quality. It can simultaneously realize copyright protection and content authentication and also has high tamper localization capability.

中文翻译：

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医学图像的多用途水印算法

考虑到现有医学图像水印算法单一功能往往存在局限性，提出一种多用途医学图像水印算法。首先，医学图像分为感兴趣区域（ROI）和非感兴趣区域（RONI）。然后，为每个 ROI 子块生成的认证水印嵌入到相应的映射子块中。将可见水印嵌入到 RONI 中，最后将 ROI 的每个子块中的水印信息和构造的认证信息嵌入到对应的 RONI 子块中。仿真结果表明，嵌入的可见水印可以保护和促进医学图像管理。此外，所提出的算法具有很强的鲁棒性和非常好的视觉质量。