RPZMWMark: RDWT-PZM-Based Image Watermarking Scheme of DICOM Image
摘要
Healthcare information management is under more pressure due to the large amount of medical data that needs to be efficiently stored, accessed, and delivered, as well as the rise in security concerns that demand extra care. This work proposes a watermarking strategy based on Schur decomposition (SD), Pseudo-Zernike moment (PZM), and Redundant Discrete Wavelet Transform (RDWT). The watermark is embedded in Schur domain by means of PZM’s rotation invariance and noise resistance capabilities. The liver ultrasound image is used as the host image in the proposed work, while the binary “logo” is used as the watermark image. To produce an appropriate frequency sub-band, the cover is first subjected to the RDWT domain. After that, the LL sub-band is subjected to SD. The presented method offers more than 40 dB peak signal-to-noise ratio (PSNR) value and shows the watermark is not detectable. The proposed method offers better resistance against different affine attacks. The suggested scheme shows improvement of 5% than several existing scheme.