Watermark embedding and extracting method, storage medium and electronic equipment

Abstract

The invention discloses a watermark embedding and extracting method, a storage medium and electronic equipment. The watermark embedding method comprises the following steps of S100, converting a picture to be embedded from an RGB (Red, Green, Blue) format into a YCbCr format, and extracting brightness component data; S200, setting the basic embedding strength of the watermark matrix, performing Wiener filtering on the brightness component of the watermark matrix, and improving the embedding strength of the picture region of which the filtering loss exceeds a set threshold value until the filtering loss of any picture region of the watermark matrix after Wiener filtering is within the set threshold value, so as to obtain dynamically distributed embedding strength; S300, after the watermark matrix is embedded into the dynamically distributed embedding strength, superposing the watermark matrix with the brightness component data in the step S100; and S400, converting the superposed picture from the YCbCr format to the RGB format to obtain a watermark picture. According to the watermark embedding method, the robustness and the concealment of the watermark can be improved.

Description

Technical field [0001] The present invention relates to digital watermarking technology, and more particularly, to a watermark embedding, extraction method and a storage medium, the electronic device. Background technique [0002] Watermark embedding method in the related art, in order to achieve the embedded watermark is not so noticeable, typically a digital watermark is embedded to a certain carrier frequency as part of the picture, a document, video, web pages, etc., so that the digital watermark is hidden in the interior of the carrier. However, this method obtained watermark, and robustness which are occult mutually exclusive; in particular, when the digital watermark is embedded in the high frequency portion of the carrier, the watermark will be higher occult, but more robust difference; if the digital watermark is embedded in the low frequency portion of the carrier, the robustness of the watermark will be higher, but will display numbers greater impact support, occult po...

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Problems solved by technology

However, the robustness and concealment of the watermark obtained by this method are mutually exclusive; specifically, if the watermark is embedded in the high-frequency part of the digital carrier, the watermark will have higher concealment, but less robustness. Poor; if the watermark is embedded in the low-frequency part of the digital carrier, the watermark will have higher robustness, but it will have a greater impact on the display of the digital carrier, and the concealment is poor

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