Color image total-blindness robustness digital watermarking method based on self-embedding technology

Abstract

The invention discloses a color image total-blindness robustness digital watermarking method based on a self-embedding technology. The method includes: performing discrete Fourier transform on each sub-block in an approaching sub-graph of a brightness component of a color image to obtain an amplitude spectrum matrix of a discrete Fourier transform coefficient matrix of each sub-block; creating a characteristic watermark and a self-embedding characteristic watermark according to the amplitude spectrum matrixes of all the sub-blocks; obtaining an amplitude spectrum matrix of a discrete Fourier transform coefficient matrix of each sub-block in an approaching sub-graph of a brightness component of a watermarking color image in the same mode; performing blind extraction of a characteristic watermark and an authentication watermark according to the amplitude spectrum matrixes of all the sub-blocks; and performing copyright protection according to a normalization correlation coefficient between the characteristic watermark and the authentication watermark obtained through blind extraction. The method is advantageous in that the embedding intensity of a digital watermark has the adaptability for an original color image and has ideal robustness for image processing attacks such as geometric translation etc., and any information of the original color image and the original digital watermark is avoided during extraction of the digital watermark.

Description

technical field [0001] The invention relates to a digital media information security technology, in particular to a color image full-blind robust digital watermarking method based on self-embedding technology. Background technique [0002] As a research hotspot in the field of information security technology, digital watermarking is an effective technical means to solve digital media copyright protection and content authentication. Digital watermarking technology uses human audiovisual characteristics and the redundancy of digital media content to embed some identification information (such as author signature, copyright logo, serial number, date or icon, etc.) into the protected original digital media through a certain algorithm. , so as to provide the necessary authentication information and copyright protection for the original digital media. [0003] Digital watermarking for copyright protection should have two basic elements: watermark robustness and watermark impercep...

AI Technical Summary

Problems solved by technology

In order to obtain better algorithm robustness and watermark invisibility, the above algorithms have made some human intervention in the selection of watermark embedding strength factor or quantization step size, and lack of adaptability to the original grayscale image.

Images