Machine learning-based color image watermark embedding and detecting method

A color image, watermark embedding technology, applied in the multimedia field, can solve the problems affecting the robustness and imperceptibility of digital watermarks

Inactive Publication Date: 2015-06-03
LIAONING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, the existing algorithm fails to reflect and retain the specific relationship of different color components in the entire color space, which will inevitably affect the robustness and imperceptibility of digital watermarking.

Method used

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  • Machine learning-based color image watermark embedding and detecting method
  • Machine learning-based color image watermark embedding and detecting method
  • Machine learning-based color image watermark embedding and detecting method

Examples

Experimental program
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Embodiment Construction

[0046] Embedding method of the present invention comprises the following steps:

[0047] Step 1: Use moment-based image normalization technology to map the original color carrier image F into the geometric invariant space, and normalize each component of the color image to obtain the corresponding normalized color image. as follows:

[0048] Step 11: extracting the RGB three components of the original color image respectively;

[0049] Step 12: Carry out grayscale image normalization processing on the R component;

[0050] Step 13: Calculate the centroid of the normalized image of the R component, and use it as the centroid of the normalized image of the G component and B component according to the definition of the invariant centroid, and perform grayscale image normalization processing on the G component and the B component respectively ;

[0051] Step 14: Combine the normalized images of the three components of RGB to obtain the corresponding normalized color image . ...

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Abstract

The invention discloses a machine learning-based color image watermark embedding and detecting method. The method comprises the following steps of firstly, using a matrix-based image normalizing technology to map a carrier image to a geometric invariant space, and combining a invariant centroid theory to determine an important area in a normalized color image; secondly, performing non-subsample Contourlet conversion on the important area of the G-component normalized color image; finally, according to a G-component visual mask model, adaptively determining embedding intensity, so that an image watermark is embedded in a low-frequency area, and the embedded watermark is guaranteed to have very good transparency and very high robustness; during watermark detection, by using the height relativity among color image components, selecting a stable feature vector training SVR (Support Vector Regression) model, and using the SVR training model to extract digital watermark information.

Description

technical field [0001] The invention belongs to the technical field of information hiding and digital watermarking in multimedia information security, especially a kind of watermarking technology that not only has better imperceptibility, but also is suitable for conventional signal processing (median filtering, edge sharpening, superimposed noise and JPEG compression, etc.) and Desynchronization attacks (rotation, translation, scaling, shearing, flipping, etc.) are robust machine learning-based color image watermark embedding and detection methods. Background technique [0002] Digital watermarking (Digital Watermarking), as an effective supplementary method to traditional encryption methods, is a new technology that can protect copyright and authenticate the source and integrity in an open network environment. A hot spot of research. The so-called digital image watermark is to hide a mark (watermark) with a specific meaning in a digital image product by means of data embe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 牛盼盼王向阳
Owner LIAONING NORMAL UNIVERSITY
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