Holographic Audio Watermark Packaging Anti-counterfeiting Method

Holographic watermarking technology used in packaging security need to have a high degree of robustness and extract information recognition requirements are high,for the current image of the watermark information packaging security methods in the packaging and printing process is difficult to break the robustness and content A single problem,proposed the use of audio as holographic watermark information embedded in the packaging image and applied to the field of packaging security and other fields.This paper explores the influence of the output mode of the printed matter on the quality of the holographic watermark extraction,and puts forward the audio holographic watermarking method as a method to improve the robustness of the image watermarking algorithm and expand the type and scope of the information.The main contents of this paper are:1.To study the effect of print output on the quality of holographic watermarking algorithm,the use of inkjet,laser,offset printing,digital printing four commonly used output of the watermark of the anti-counterfeit image output,from the substrate paper,image mode conversion and output accuracy And so on,the factors that affect the quality of watermark extraction under different output modes are analyzed.2.This paper proposes a holographic watermarking method based on discrete wavelet transform as the basic transformation method and audio watermarking information.It combines the characteristics of image / audio information and the sensitivity of human auditory system to widen the scope of image watermarking technology,Has a stronger robustness and practicality than a single image or audio information security algorithm.3.This paper presents an anti-print anti-jamming scheme based on Discrete quaternion Fourier transform and Discrete wavelet transform with audio as watermark information,transforms the Z-shape of the mono audio information,transforms the invariance of the linear polar coordinate transformation and improves the anti-geometric attack of thewatermarking algorithm capacity,the two-dimensional audio data produced as Fourier hologram as embedded watermark information protection and other fields.