A real-time robust digital watermark embedding and extraction method based on two-dimensional code

Abstract

The invention discloses a real-time robust digital watermark embedding and extraction method based on a two-dimensional code. Through six specific steps of coding watermark digital information, encrypting the watermark digital information, outputting an embedded watermark image, extracting a watermark original image, restoring the watermark original information and outputting the extracted watermark digital information, a multiple encryption method is provided for processing the watermark information and embedding the information to a carrier, the white noise characteristics of the watermark information can be greatly enhanced, and the watermark cracking difficulty, the safety and the non perception are improved.

Description

technical field [0001] The present invention relates to the field of digital watermarking, more specifically, it relates to a method for embedding and extracting a real-time robust digital watermark based on a two-dimensional code. Background technique [0002] Digital watermark technology is to embed some identification information (that is, digital watermark) directly into digital carriers (including multimedia, documents, software, etc.), but it does not affect the use value of the original carrier, and it is not easy to be detected by human perception systems (such as vision or hearing). system) perceive or notice. Through the information hidden in the carrier, the purpose of confirming content creators, buyers, transmitting secret information, or judging whether the carrier has been tampered with can be achieved. Digital watermarking is an effective way to protect information security, realize anti-counterfeiting traceability, and copyright protection. It is an importa...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the existing digital watermarking algorithms based on transform domain can only resist signal processing attacks such as image compression and filtering, but their robustness to geometric attacks such as rotation, translation, scaling and cropping is very low.

At the same time, due to the watermark embedding in the transform domain, the conversion between the space domain and the transform domain is required, and the calculation amount is large, so it cannot be processed in real time.

[0004] In addition, the original watermark information basically used by the digital watermarking algorithm is a binary watermark image or a pseudo-random signal, and the capacity of the watermark information is small, and meaningful string information cannot be used.

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