Digital image watermark detection method based on support vector machine correction

A technology of support vector machine and digital image, applied in the field of image processing, can solve problems such as poor resistance effect, and achieve the effect of enhancing practicability, improving robustness and simple calculation

Inactive Publication Date: 2012-07-18
LIAONING NORMAL UNIVERSITY
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Problems solved by technology

But unfortunately, the existing digital image watermark detection methods focus on the research against conventional signal processing (such as lossy compression, low-pass filtering, noise interference, etc.), while such methods as rotation, scaling, translation, row and column removal, The resistance to shearing and isogeometric attacks is not good

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  • Digital image watermark detection method based on support vector machine correction
  • Digital image watermark detection method based on support vector machine correction
  • Digital image watermark detection method based on support vector machine correction

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] Such as figure 1 Shown, method of the present invention comprises the following steps:

[0016] Step 1: Embed a watermark in the original image. This step also includes the following steps:

[0017] Step 11: Perform preprocessing and encryption on the binary watermark image to eliminate the pixel spatial correlation of the binary watermark image, improve the security of the digital watermark system, and ensure that the watermark can still be fully or partially restored after a certain part of the digital image is damaged.

[0018] Step 12: Perform complex tower transformation on the original image to obtain high-frequency sub-band coefficients and low-frequency sub-band coefficients.

[0019] Step 13: Quantize the low-frequency sub-band c...

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Abstract

The invention discloses a digital image watermark detection method based on support vector machine correction, which comprises the following steps of: extracting the phase information of an image in a high-frequency sub-band after the to-be-detected image is subjected to plural pyramid transformation, calculating the energies of Gaussian-Hermite moments on the four directions of a second level of high-frequency sub-band and taking the energies as training features; and training a sample in combination with the minimum square support vector machine theory to obtain a training model, thereby carrying out geometric correction. As the plural pyramid transformation and the support vector machine theory are combined, the digital watermark robustness can be effectively improved through the method, and meanwhile, the imperceptibility and the amount of information of a digital watermark are ensured. The digital image watermark detection method has the characteristics of simple calculation and no original carrier required in the watermark extraction, and the practicability of the watermark for digital image copyright protection is enhanced.

Description

technical field [0001] The invention belongs to the field of image processing, and is characterized by a digital image watermark detection method based on support vector machine correction. Background technique [0002] As an effective supplement to traditional encryption methods, digital watermarking is a new technology that can protect copyright and authenticate the source and integrity in an open network environment. In recent years, it has attracted people's attention and has become a hot spot in international academic research . [0003] Digital image watermarking is to hide a mark (watermark) with a specific meaning in a digital image product by means of data embedding to prove the creator's ownership of his work and serve as a basis for identifying and prosecuting illegal infringement. The detection and analysis of watermark ensures the integrity and reliability of digital information, thus becoming an effective means of intellectual property protection and digital m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G06K9/66
Inventor 王向阳苗婀娜
Owner LIAONING NORMAL UNIVERSITY
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