PDF(Pubmed)
Abstract：
The paper addresses the issue of ensuring the authenticity and copyright of medical images in telemedicine applications, with a specific emphasis on watermarking methods. While several systems only concentrate on identifying tampering in medical images, others also provide the capacity to restore the tampered regions upon detection. While several authentication techniques in medical imaging have successfully achieved their goals, previous research underscores a notable deficiency: the resilience of these schemes against unintentional attacks has not been sufficiently examined or emphasized in previous research. This indicates the need for further development and investigation in improving the robustness of medical image authentication techniques against unintentional attacks. This research proposes a Reversible-Zero Watermarking approach as a solution to address these problems. The new approach merges the advantages of both the reversible and zero watermarking techniques. This system is comprised of two parts. The first part is a zero-watermarking technique that uses VGG19-based feature extraction and watermark information to establish an ownership share. The second part incorporates this ownership share into the image in a reversible manner using a combination of a discrete wavelet transform, an integer wavelet transform, and a difference expansion. Research findings confirm that the suggested watermarking approach for medical images demonstrates substantial enhancements compared to current methodologies. Research findings indicate that NC values are often around 0.9 for different attacks, whereas BER values are close to 0. It demonstrates exceptional qualities in being imperceptible, distinguishable, and robust. Additionally, the system provides a persistent verification feature that functions independently of disputes or third-party storage, making it the preferred choice in the domain of medical image watermarking.
摘要：
本文解决了在远程医疗应用中确保医学图像的真实性和版权的问题，特别强调水印方法。虽然几个系统只专注于识别医学图像中的篡改，其他还提供了在检测时恢复被篡改区域的能力。虽然医学成像中的几种认证技术已经成功地实现了它们的目标，先前的研究强调了一个显著的缺陷:在先前的研究中，这些方案对无意攻击的弹性没有得到充分的检查或强调。这表明需要进一步开发和研究以提高医学图像认证技术对无意攻击的鲁棒性。本研究提出了一种可逆零水印方法来解决这些问题。新方法融合了可逆水印技术和零水印技术的优点。该系统由两部分组成。第一部分是零水印技术，该技术使用基于VGG19的特征提取和水印信息来建立所有权份额。第二部分使用离散小波变换的组合以可逆的方式将这种所有权份额合并到图像中，整数小波变换，和差异扩展。研究结果证实，与当前方法相比，建议的医学图像水印方法显示出实质性的增强。研究结果表明，对于不同的攻击，NC值通常在0.9左右，而BER值接近0。它展示了难以察觉的非凡品质，可区分的，和强大的。此外,该系统提供持久验证功能，独立于争议或第三方存储，成为医学图像水印领域的首选。
