Digital image watermark detection method based on support vector machine correction

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...

AI Technical Summary

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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