Watermark embedding method, device and equipment and computer readable storage medium

Abstract

The invention discloses a watermark embedding method. The watermark embedding method comprises the following steps: acquiring a pre-generated basic watermark graph and pre-generated ciphertext information; wherein the basic watermark pattern is a snowflake-shaped pattern; filling the basic watermark pattern according to the ciphertext information to obtain a watermark pattern; arranging the watermark patterns according to a preset rule to generate a watermark layer; and overlapping the watermark layer and the file in which the watermark is to be embedded. The invention also discloses a watermark embedding device, equipment and a computer readable storage medium, which can effectively improve the resistance of the watermark to geometric attacks and copying attacks, so that the watermark canstill reduce the watermark information with high precision after the watermark is subjected to the geometric attacks or the copying attacks.

Description

technical field [0001] The present invention relates to the technical field of digital watermarking, in particular to a watermark embedding method, device, equipment and computer-readable storage medium. Background technique [0002] With the development and progress of information technology, the exchange of multimedia information has reached an unprecedented depth and breadth, but this has also brought problems such as infringement, illegal copying and dissemination of multimedia files. Therefore, how to protect the copyright of multimedia files has been highly valued by people. , and watermark embedding technology, as an important means of multimedia file copyright protection, has played an important role in promoting the development of information technology. [0003] At present, the types of digital watermarks embedded in multimedia files include invisible watermarks and plaintext watermarks. By adding invisible watermarks or plaintext watermarks to multimedia files in ...

AI Technical Summary

Problems solved by technology

[0004] The inventor found in the process of implementing the present invention that in the prior art, when the type of digital watermark embedded in a multimedia file is an invisible watermark, it is difficult for crackers to detect The watermark information is restored from the photo obtained by remaking the multimedia file, and the invisible watermark has low resistance to remake attacks

When the type of digital watermark added to a multimedia file is a plaintext watermark, since the plaintext watermark usually arranges ciphertext horizontally, vertically or obliquely, the regularity is strong, and the cracker can avoid it by copying the multimedia file from a specific angle. In the watermark area, in addition, even if the screenshot or photo of the multimedia file contains a plaintext watermark, once the cracker performs geometric attacks such as enlarging, reducing, distorting or cutting the screenshot or photo, the watermark in the screenshot or photo can be destroyed. As a result, the watermark information cannot be accurately restored, and the plaintext watermark has low resistance to geometric attacks and remake attacks

Images