Encrypted medical image robust watermarking method based on DWT-Gabor

Abstract

The invention discloses an encrypted medical image robust watermarking method based on DWT-Gabor. The method comprises the following steps: encrypting an original medical image by using a DWT-DCT algorithm in combination with a Tent sequence; under DWT-Gabor transformation, extracting a feature vector of the encrypted medical image, and generating a feature sequence; carrying out chaos scrambling encryption on the original watermark to obtain a chaos scrambling watermark, embedding the watermark information into the encrypted medical image according to the chaos scrambling watermark and the feature sequence, and meanwhile obtaining and storing a logic secret key; similarly, generating a visual feature sequence of the encrypted medical image to be detected; extracting an encrypted watermark according to the visual feature sequence and the logic key, and decrypting the encrypted watermark to obtain a reduced watermark; and performing normalized correlation coefficient calculation on the original watermark and the reduced watermark, and determining the ownership of the original medical image and embedded watermark information. Therefore, the privacy information of the patient and the data safety of the medical image can be effectively protected.

Description

technical field [0001] The invention relates to the field of multimedia signal processing, in particular to a robust watermarking method for encrypted medical images based on DWT-Gabor. Background technique [0002] With the advancement of science and technology and the development of society, human society has entered the information age, but it has also brought some problems, that is, the security of information during transmission, especially for some private and important information. Safety issues in the process need to be resolved urgently. The field of medical image processing is a vivid example. A large number of medical images may suffer from a series of problems such as tampering and misappropriation during transmission and sharing in the network. This requires encryption of encrypted medical images and patient information as a watermark The form is embedded in the medical image, which improves the security technology and ensures that the data can not only ensure ...

AI Technical Summary

Problems solved by technology

[0003] The development of digital watermarking technology has brought considerable progress in copyright protection, information security, information hiding, etc. Although traditional digital watermarking algorithms have certain invisibility and robustness, such algorithms have carried out image data Modification, how much will cause damage to the quality of the image

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