Robust reversible image watermarking algorithm based on invariant features

Abstract

The invention relates to the field of image processing and digital watermarking. The invention discloses a robust reversible image watermarking algorithm based on invariant features. The robust reversible image watermarking algorithm comprises watermark embedding and watermark extracting, wherein watermark embedding and watermark extracting are achieved by improving cat face scrambling transformation, normalization processing, scale invariant feature transform (SIFT operator), a level set method, integer wavelet transformation, singular value decomposition, an odd-even quantization algorithm and the like to process an original image and a watermark. Compared with the prior art, the robust reversible image watermarking algorithm has the advantages that the original carrier image can be completely recovered after the watermark is extracted, and the algorithm reversibility is realized; the robust reversible image watermarking algorithm has good transparency, has high robustness to conventional attacks and general geometric attacks, is high in overall performance, and can maintain good image visual quality; and the embedding size of the watermark can be adaptively determined, and the capacity of resisting attacks such as scaling is resisted.

Description

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AI Technical Summary

Benefits of technology

In this patented method for creating images that cannot be easily copied or changed without losing their integrity it uses an irreversibly water markable material called toner (which contains tiny particles). By adding these small materials into the image during printing, any attempts at copying them will render those portions with no change over time. Additionally, by adjusting certain parameters on top of existing data, we have improved resistance towards various types of damage like scale changes. Overall, our technology improves security measures when used alone.

Problems solved by technology

This patents discusses various technical problem addressed during developing an improved reversibility (reversal property), including preventive measures like reverse copying or scanning techniques, encryption systems, authentication protocols, etc., while ensuring reliable data transmission over communication networks.

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