Multiple Watermark Method for Privacy Control and Tamper Detection in Medical Images.
Woo Chaw Seng, Jiang Yi Du, Binh Pham · QUT ePrints (Queensland University of Technology) · 2005
Medical images in digital form must be stored in a secure way to preserve stringent image quality standards and prevent unauthorised disclosure of patient data. This paper proposes a multiple watermarking method to serve these purposes. A multiple watermark consists of an annotation part and a fragile part. Encrypted patient data can be embedded in an annotation watermark, and tampering can be detected using a fragile watermark. The embedded patient data not only save storage space, it also offers privacy and security. We also evaluate the images’ visual quality after watermark embedding and the effectiveness of locating tampered regions.