Robust watermarking method for encrypted medical images based on dwt-gabor

Abstract

The present application discloses a method for robust watermarking of encrypted medical images based on DWT-Gabor, including: encrypting the original medical image by using the DWT-DCT algorithm combined with the Tent sequence; , generate a characteristic sequence; perform chaotic scramble encryption on the original watermark to obtain a chaotic scrambled watermark, and embed the watermark information into the encrypted medical image according to the chaotic scrambled watermark and the characteristic sequence, and obtain and save the logical key at the same time; The visual feature sequence of the encrypted medical image to be tested; according to the visual feature sequence and the logical key, the encrypted watermark is extracted, and the encrypted watermark is decrypted to obtain the restored watermark; the original watermark and the restored watermark are calculated by normalizing the correlation coefficient to determine the original Ownership of medical images and embedded watermark information. This can effectively protect the patient's private information and the data security of medical images.

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 in the process of transmission, especially for some private and important information, in the transmission Safety issues in the process need to be resolved urgently. The field of medical image processing is a clear example. A large number of medical images may suffer from a series of problems such as tampering and embezzlement in the process of transmission and sharing in the network. This requires encryption of encrypted medical images and watermarking of patient information. The form is embedded in the medical image, which improves the security technology and en...

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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