Function digital watermark encrypting system based on wavelet transformation and hyperchaos algorithm

Abstract

The invention discloses a function digital watermark encrypting system based on a wavelet transformation and hyperchaos algorithm. The system comprises (1) an initial module, (2) a pass point selecting module, (3) a watermark embedding module and (4) a watermark verification module, wherein the initial module is an initial interface; the pass point selecting module is used for selecting a point in which a watermark is embedded; a user selects a hyperchaos system initial value as a personal private key, encrypts the watermark embedding point by using a hyperchaos encryption algorithm to form an encryption point sequence, and saves an encryption point sequence; the watermark embedding module is used for embedding a personal watermark selected by the user into an image to be encrypted selected by the user; and the watermark verification module is used by an arbitration party to submit the encryption point sequence and the personal private key and verify the copyright ownership when a dispute occurs. The embedded function data volume is small, the change of the original image by the watermark is small, and the system is closed to a zero-watermark algorithm and has high robustness, high safety performance, high efficiency and small implementation penalty.

Description

technical field [0001] The present invention relates to an encryption system, in particular to a functional digital watermark encryption system based on wavelet transform and hyperchaotic algorithm. Background technique [0002] With the application of digital media products more and more widely, the protection of digital image copyright has more practical significance. It is also becoming more and more important to effectively protect the rights and interests of copyright owners and combat piracy. Digital watermarking is one of the important methods to effectively protect multimedia copyright. It embeds specific information representing digital media copyright owners, user-specified logos or serial codes, etc., into protected works according to certain algorithms. When a copyright dispute occurs, the embedded feature information is extracted through the corresponding algorithm to verify the ownership of the copyright, thereby ensuring the legitimate interests of the author...

AI Technical Summary

Problems solved by technology

[0004] Most of the watermark embedding in the existing transform domain algorithm is embedded in the high-frequency region of the transform. When low-pass filtering is performed, the high-frequency information is often filtered out, and the restored watermark effect is poor.

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