IWT-based robust medical image watermarking for tamper detection and ROI recovery
Fang Ren, Cong Tian, Yuge Liu · 2023
With the rapid development of the Internet and multimedia technology, it becomes more convenient to transmit medical images in remote areas. In the process of transmission, the contents of medical images may be modified, leading to doctors' misdiagnosis of diseases and threatening patients' health. Therefore, doctors need to ensure the integrity of the region of interest in the medical image before making the diagnosis. This paper proposed a novel watermarking algorithm based on integer wavelet transform. The algorithm includes four phases: watermark embedding phase, authentication phase, tamper detection and location phase and lossless recovery phase. In this scheme, recovery bit was embedded into RONI using integer wavelet transform. Experimental results show that the proposed method has high robustness for the data embedded in region of RONI, can accurately identify and recover tampered region of ROI. Compared with other schemes, the proposed method has higher compression rate for the data of ROI.