Adaptive reversible watermarking method for medical image authentication and doctor-patient information hiding

Abstract

The invention relates to an adaptive reversible watermark method for medical image authentication and doctor-patient information hiding, which is used for integrity authentication of medical images and realizes hidden communication of doctor-patient information. The present invention divides the original medical image into blocks, selects the embedding strength according to the needs of the embedded watermark capacity, and adopts a method of shifting the peak point in the block difference histogram to realize large-capacity and self-adaptive invisible watermark information embedded. The watermark information is composed of doctor-patient information and auxiliary information, which realizes the hidden communication of doctor's diagnosis information and patient's personal information. At the detection end, by extracting the watermark information, the integrity authentication of the image can be realized, and the original medical image and doctor-patient information can be restored without loss. The invention has low algorithm complexity, high security and strong practicability.

Description

technical field [0001] Multimedia information security and multimedia information processing Background technique [0002] The medical images produced by modern medical diagnostic equipment, such as X-ray, CT, MR, ultrasound, endoscopy and angiography, not only play an extremely important role in diagnosis, but also account for more than 70-80% of the medical information of the entire hospital. The medical imaging data not only occupies a large amount of storage space, but also brings huge security risks in the management of information. At the same time, when digital medical information is transmitted on the public network, it is very easy to be intercepted or tampered with, and once the digital medical image used as the basis for diagnosis is abnormal (such as forgery, tampering, information confusion, etc.), not only cannot be used as a medical malpractice judgment If there is no strong evidence, it will delay the best diagnosis and treatment time for patients and even c...

AI Technical Summary

Problems solved by technology

Its advantage is that the watermark is invisible and the calculation is simple, but the disadvantage is that the amount of watermark allowed to be embedded depends on the distribution of image features and the overall watermark embedding capacity is small

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