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Abstract
Image processing techniques have played a very significant role in the past decades in the field of medical sciences for diagnosis and treatment purposes. In some applications, medical images are divided into region of interest (ROI) and region of non-interest (RONI). Important information regarding diagnosis is contained in the ROI, so its integrity must be assured. We propose a fragile watermarking technique to ensure the integrity of the medical image that avoids the distortion of the image in ROI by embedding the watermark information in RONI. The watermark is composed of patient information, hospital logo and message authentication code computed using a hash function. Earlier encryption of watermark is performed to ensure inaccessibility of embedded data to the adversaries.
Acknowledgements
Authors are very grateful to the Ghulam Ishaq Khan Institute of Engineering Sciences and Technology for providing resources and environment for carrying out this research and AGA Khan Hospital Karachi, Pakistan, for providing the database for the experimental work. Also, this work was supported by Quaid-e-Awam University of Engineering, Science and Technology, Nawabshah, Sindh, Pakistan, under Inland Scholarship Programme. \reversemarginpar