In order to contribute to the security of medical image, we present in this paper a blind and robust watermarking technique that allows the integration of the electronic patient’s record into a computerized tomography scan. In this approach, a discrete wavelet transform is applied to the image before the integration process, then, a topological reorganization of the coefficients of the LL sub-bands is done by the ZigZag scanning method. The obtained coefficients are then combined to integrate the watermark bits. A hash of the electronic patient record being integrated in the image, the integrity of the watermark can easily be verified. After the evaluation of our approach in terms of invisibility and robustness, the experimental results obtained show that our approach offers excellent imperceptibility (with a PSNR above 70 dB) and very good robustness against several geometric and destructive attacks.

为了促进医学图像的安全性，我们在本文中提出了一种盲目且鲁棒的水印技术，该技术可将电子病历集成到计算机断层扫描中。在这种方法中，在积分过程之前将离散小波变换应用于图像，然后通过ZigZag扫描方法对LL子带的系数进行拓扑重组。然后将获得的系数组合起来以对水印位进行积分。电子病历的哈希值被集成到图像中，可以轻松地验证水印的完整性。在评估我们的方法的不可见性和鲁棒性之后，