Research On Dual Digital Watermarking Algorithm Based On Wavelet Transform Domain

Nowadays, with the rapid development of computer network technology, people use the Internet to transfer and acquire all kinds of multimedia information. However, the security of multimedia information has not been guaranteed, piracy infringement, malicious tampering with the phenomenon of an endless stream. Digital watermarking technology as a new technology in the field of anti piracy is the main means to solve the problem of piracy and authenticity verification. At present, the variety of digital watermarking algorithm is very single, which can not only realize the function of copyright authentication, but also can realize the authenticity authentication.In this paper, a dual digital watermarking algorithm based on wavelet transform domain is proposed for the above problems. First of all, the algorithm by use of the multi-layer wavelet decomposition and local characteristics in low frequency region of original image 3 transform the ingenious using average adjacent characteristics calculation method of embedding the watermark robustness to achieve image copyright protection. Secondly, on this basis will block the robustness of watermark image carrier for three-level wavelet transform extract the low-frequency part of the correlation coefficient as a watermark (i.e. semi fragile watermarking) into 2 level transformation of middle and high frequency components of the image content protection function and the success of locating the tampered location of. Finally, the algorithm of this paper has successfully achieved the double protection of image copyright and image content. The simulation results show that the algorithm has high robustness, invisibility and security. Compared with some similar algorithms, the algorithm proposed in this paper has a higher performance in the performance of the proposed algorithm.This paper also studied the qr code technology, and the watermarking technology and the integration of qr code technology designed the qr code watermarking algorithm, the algorithm is both foil is made of the advantages of wavelet transform in the aspect of image processing also reflects the qr code in the watermarking algorithm characteristics laid the foundation for later research work.