Watermark Intensity Effect on Robustness and Imperceptibility of Medical Images

The present study investigates the imperceptibility and robustness of five watermarks that were implemented on medical images using the DWT-HD-SVD algorithm. By employing the evaluation metrics normalized correlation (NC) and peak signal-to-noise ratio (PSNR), the algorithm’s resistance to various attacks is determined. The outcomes demonstrate the robustness of the DWT-HD-SVD algorithm by consistently achieving a value of 1 in the face of the majority of applied attacks. Additionally, the research demonstrates a clear association between the PSNR and the watermark intensity: a reduction in watermark intensity is accompanied by an augmentation in PSNR. The DWT-HD-SVD algorithm maintains the imperceptibility of watermarked medical images and demonstrates high resistance to common attacks, according to these results.