胸部CT扫描医学图像的内容认证水印

N. Memon, S. Gilani
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引用次数: 80

摘要

医学图像通常由感兴趣区域(ROI)和非感兴趣区域(RONI)组成。从诊断的角度来看,ROI是包含重要信息的区域,因此必须不失真地存储。提出了一种通过在ROI中嵌入水印信息来避免ROI图像失真的数字水印技术。水印由患者信息、医院标识和消息认证码组成,采用哈希函数计算。对水印进行早期BCH加密,以确保嵌入的数据无法被攻击者访问。
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Watermarking of chest CT scan medical images for content authentication
Medical image is usually comprised of region of interest (ROI) and region of non interest (RONI). ROI is the region that contains the important information from diagnosis point of view so it must be stored without any distortion. We have proposed a digital watermarking technique which avoids the distortion of image in ROI by embedding the watermark information in RONI. The watermark is comprised of patient information, hospital logo and message authentication code, computed using hash function. Earlier BCH encryption of watermark is performed to ensure inaccessibility of embedded data to the adversaries.
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