Watermark embedding method and device, watermark detection method and device and electronic equipment

Abstract

The invention discloses a watermark embedding method and a watermark detection method. The watermark embedding method comprises the steps of obtaining a noise template needing to be embedded into a to-be-embedded image; obtaining a gradient characteristic value of a pixel of the image to be embedded, and generating a zero setting mask according to the gradient characteristic value; determining a weight template according to the zero setting mask; obtaining watermark information according to the weight template and the noise template; embedding the watermark information into the image to be embedded. The watermark detection method comprises the steps of obtaining a high-frequency component of a to-be-detected image; performing first autocorrelation processing on the high-frequency componentto obtain a first autocorrelation result; performing second autocorrelation processing on the first autocorrelation result to obtain a second autocorrelation result; judging whether the to-be-detected image contains a watermark template or not according to the second autocorrelation result. By adopting the method, the digital image embedded with the watermark can resist attacks such as puzzle, matting, bottom changing and the like for the digital image.

Description

technical field [0001] The present application relates to the field of computer technology, in particular to a watermark embedding method, device and electronic equipment. The present application also relates to a watermark detection method, device and electronic equipment. The present application also relates to a data processing method. Background technique [0002] Today, when digital information is widely disseminated, digital images are widely used. Digital images are easy to spread, easy to copy, and easy to be tampered with, which makes it difficult to solve the copyright issues of digital images. At present, image watermarking is often used to protect digital image copyright. The so-called image watermarking refers to the image manipulation technology that adds specific information to the image and extracts specific information for ownership certification, piracy tracking and content authentication when needed. [0003] Digital images are easy to obtain and easy ...

AI Technical Summary

Problems solved by technology

These attack methods are simple, common and diverse, but they are extremely destructive to existing digital image watermarks, destroying the relative position and order of watermark extraction, and destroying the statistical characteristics of images

Existing digital image watermarking often adopts a block method or a statistical method, so it cannot resist the above-mentioned attacks

[0004] Therefore, the image watermark embedding scheme in the prior art has the problem of being unable to resist attacks such as mosaic, cutout, and base replacement.

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