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An image digital watermark embedding method and its detection method

A watermark embedding and watermarking technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of small watermark information capacity, poor robustness against attacks, etc., and achieve low false detection rate, high detection rate, and easy control Effect

Inactive Publication Date: 2016-11-30
北京中盈信安科技发展有限责任公司
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Problems solved by technology

However, the common digital image watermarking technology in the prior art has poor robustness against attacks and the watermark information capacity is small, so it cannot well resist the attack methods commonly used by pirates.

Method used

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  • An image digital watermark embedding method and its detection method
  • An image digital watermark embedding method and its detection method
  • An image digital watermark embedding method and its detection method

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Embodiment Construction

[0030] In order to be able to resist the commonly used attack methods of pirates, such as rotation, cropping, scaling, etc., and to maintain a good visual effect of the image embedded with the watermark, and to achieve blind extraction when the watermark is detected, the present invention provides a binary image digital A method for embedding a watermark and a method for extracting a digital watermark in a binary image, wherein the specific flow of the method for embedding the watermark is as follows, see figure 1 :

[0031] Step 101: Acquire source image S1;

[0032] Step 102: Taking one point of the source image S1 or its subset as the center to form multiple concentric circles, thereby dividing the source image into a central circle block and a plurality of ring blocks, according to the color component values ​​of each pixel in the center circle and the ring bands Store in the matrix to obtain the first digital sequence S2;

[0033] Step 103: The central block and the rin...

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Abstract

The invention provides an image digital watermark embedding method and a detection method thereof. The method of embedding the watermark includes dividing the source image into a central circle block and a plurality of annular blocks, and then transforming each group of data with a transform domain watermark algorithm and embedding the image digital watermark into the source image; the method of detecting the watermark includes the image to be detected Carry out the same block step as the embedding process, and carry out the same transformation domain watermark algorithm transformation, and realize the extraction and comparison steps of the watermark. The application of the watermark embedding and its detection in the present invention can solve the technical problems of poor anti-attack robustness and small watermark information capacity of ordinary image digital watermarks in the prior art. The tailored geometric transformation attack is easy to combine with other digital watermarking techniques to achieve resistance to non-geometric transformation attacks such as channel noise, filtering and lossy compression.

Description

technical field [0001] The invention relates to the technical field of image digital watermark; more specifically, it relates to an image digital watermark embedding method and a detection method thereof. Background technique [0002] In the field of digital watermarking technology, geometric transformation processing such as rotation, cropping, and scaling are the most commonly used attack methods by digital image copyright pirates. The direct consequence of these attack methods is to destroy the synchronization between the digital watermark detector and the digital watermark, so that The detector cannot detect the digital watermark signal in the image. Along with geometric transformation attacks, copyright pirates may also implement attacks such as channel noise, filtering, and lossy compression. When a digital image undergoes geometric transformation, a large number of interpolation operations are required. While the position information of the original digital image inf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 余伟华刘泽吴龙为
Owner 北京中盈信安科技发展有限责任公司
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