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

Abstract

The invention discloses a watermark embedding and extracting method and device based on a computer vision technology, computer equipment and a storage medium. The method comprises the following steps: identifying a first feature point of a target image; determining a watermark embedding area of the target image based on the distribution information of the first feature points on the target image; performing frequency domain decomposition processing on the watermark embedding area to obtain at least two sub-band images, and selecting a target sub-band image according to high-frequency information and low-frequency information of the watermark embedding area contained in each sub-band image; embedding the watermark into the target sub-band image to obtain an embedded target sub-band image; replacing the target sub-band image of the watermark embedding area with the embedded target sub-band image; according to the method, the subband image of the watermark embedding area is subjected to inverse processing of frequency domain decomposition processing to obtain the target image with the embedded watermark, so that the watermark embedding area is selected based on the feature points of the target image, the self-adaptability of the watermark embedding area is improved, and the robustness and the safety of the embedded watermark are ensured.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a watermark embedding and extraction method, device, computer equipment and storage medium. Background technique [0002] Digital watermarking is a kind of protection information embedded in the carrier file using computer algorithms. It embeds some identification information directly into the digital carrier or indirectly represents it, and does not affect the use value of the original carrier, and is not easy to be detected and modified again. [0003] In the process of digital watermark embedding in the target image, it is generally necessary to select the watermark embedding area first, and then embed the watermark. In related technologies, when selecting the watermark embedding area of ​​different images, it is easy to have some fixed positions as the watermark embedding area. When subjected to image attacks, this kind of watermark embedding area cannot pr...

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Problems solved by technology

[0003] In the process of digital watermark embedding in the target image, it is generally necessary to select the watermark embedding area first, and then embed the watermark. In related technologies, when selecting the watermark embedding area of ​​different images, it is easy to have some fixed positions as the watermark embedding area. When subjected to image attacks, this watermark embedding area cannot provide good robustness, and it is prone to the problem that the watermark cannot be fully extracted

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