Medical image robust watermarking method based on Tetrolet-DCT

A medical image, robust watermarking technology, applied in the direction of image communication, digital transmission system, security communication device, etc., can solve the problems of original image data modification, inability to protect medical images, defects, etc.

Pending Publication Date: 2020-11-24
HAINAN UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the traditional digital watermark embedding method is only used for the copyright protection of digital media, and cannot protect the medical image itself, and it ...

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  • Medical image robust watermarking method based on Tetrolet-DCT
  • Medical image robust watermarking method based on Tetrolet-DCT
  • Medical image robust watermarking method based on Tetrolet-DCT

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Embodiment Construction

[0067] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0068] The present invention provides a Tetrolet-DCT-based medical image robust watermarking method, such as figure 1 shown, including the following steps:

[0069] S101. Perform feature extraction on the original medical image through Tetrolet-DCT transformation, obtain a coefficient matrix of the original medical image, and generate a visual feature sequence of the original medical image by hash function operation;

[0070] In practical applications, before...

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Abstract

The invention discloses a medical image robust watermarking method based on Tetrolet-DCT. The medical image robust watermarking method comprises the following steps: performing feature extraction on an original medical image through Tetrolet-DCT and generating a visual feature sequence by utilizing a hash function; performing chaos scrambling encryption on the original watermark to obtain a chaosscrambling watermark, embedding watermark information into the original medical image, and meanwhile obtaining a binary logic secret key sequence and storing; similarly, performing feature extractionon the medical image to be detected through Tetrolet-DCT transformation, and generating a visual feature sequence; extracting an encrypted watermark according to the visual feature sequence and the binary logic key sequence, and decrypting the encrypted watermark to obtain a reduced watermark; and performing normalization correlation coefficient calculation on the original watermark and the reduced watermark, and determining the ownership and watermark information of the medical image to be detected. The zero watermark embedded in the method has invisibility and robustness, and the privacy information of the patient and the data security of the medical image can be protected.

Description

technical field [0001] The invention relates to the field of multimedia signal processing, in particular to a Tetrolet-DCT-based robust watermarking method for medical images. Background technique [0002] With the development of modern technology and information, human beings have entered the information age. The medical field is no exception. With the help of computers, medical images can be used and studied in a wider range. At the same time, medical images are related to the privacy of patients, so they may suffer from tampering and embezzlement during network transmission. [0003] Since a large number of medical images have security problems in network transmission, and medical data is not allowed to be modified, it is necessary to provide effective protection for medical images. However, the traditional digital watermark embedding method is only used for the copyright protection of digital media, and cannot protect the medical image itself, and it is easy to cause de...

Claims

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Application Information

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IPC IPC(8): H04N1/32H04L9/00
CPCH04N1/32165H04N1/3217H04N1/32267H04N1/32283H04L9/001H04L2209/608
Inventor 李京兵崔文凤黄梦醒
Owner HAINAN UNIVERSITY
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