Image digital watermark method

A digital watermarking and image technology, applied in image data processing, image enhancement, image communication, etc., can solve the problem that judges cannot judge criminals, achieve invisibility and robustness, ensure validity and reliability, and broaden application fields Effect
CN1517855AInactive Publication Date: 2004-08-04成都市宇飞信息工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
成都市宇飞信息工程有限公司
Publication Date
2004-08-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A digital watermark method for image includes such steps as inputting product data, converting it to frequency domain data, inputting private information of user, generating watermark information by RS unit, embedding the watermark into the frequency domain of product, converting it to airspace time domain to become product data, outputting the product with watermark. The watermark check includes converting the product data to frequency domain data, generating check information from private information, correlation analyzing between said frequency domain data and check information, and explaining.
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Description

technical field

[0001] The present invention relates to an information hiding technology, specifically to a frequency-domain watermarking method for digital images, which enables works and products carrying digital watermark information to be legally used in an open information environment, while works, The watermark information hidden in the product can be provided for detection and use at any time, which can provide a very effective solution for the protection of intellectual property rights, concealed identification, tampering prompts, covert communication and counterfeiting. Background technique

[0002] With the development of computer technology, multimedia products have increased rapidly. Also due to the rapid popularization of the Internet, the acquisition channels of these products have also expanded rapidly, and the various tools for operating these media have also increased rapidly. All of this makes the legal use of digital products a very serious issue. In ord...

Claims

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