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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

Inactive Publication Date: 2004-08-04
成都市宇飞信息工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is more likely that the owner of X is too lazy to make a copy X′, and directly claims that he has not issued any watermarked version of the data, and the owner of I just subtracts the signature information Sx from X to get I. For the judge There is no way to tell who is the criminal

Method used

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  • Image digital watermark method
  • Image digital watermark method
  • Image digital watermark method

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Embodiment Construction

[0031] An image digital watermarking method, which is composed of watermark information generation, watermark information hiding and watermark information detection method, is characterized in that: the generation and hiding of watermark information are carried out according to the following method: users provide products and personal information to be protected, including Personal registration ID or meaningful text, private password saved by oneself, embedding personal information into the product through a one-way process; this process will generate a watermark sequence S according to a certain algorithm 1 , superimposed to the frequency domain data D of the product with a certain intensity f Medium; specifically, to add watermarks to products for copyright protection, the method is to first read the product files from the input and output files to form product data; the user fills in the personal information in the information input file; after the user confirms, the input ...

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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.

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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Application Information

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IPC IPC(8): G06F7/58G06T5/00H04N5/913
Inventor 李炳法孙家水
Owner 成都市宇飞信息工程有限公司
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