Image Watermarking Algorithm Based On Quantum Daubechies Db4 Wavelet

Wavelet transform has good localization characteristics both in time domain and frequency domain,so it has been widely paid attention by scholars.Currently,wavelet transform has important applications in signal detection,image analysis,image compression and other aspects.In the process of embedding and extracting image watermark,as a watermark embedding technology based on transform domain,discrete wavelet transform can decompose image signal into different resolution space.By modifying the wavelet coefficient,the watermark image can be hidden better.At the same time,based on the proposed quantum image representation methods,quantum watermarking embedding technology has also been greatly developed.Due to the natural parallel computing ability of quantum computer,quantum image processing can solve the shortage of storage capacity and processing speed of traditional computer,quantum image processing has become the focus of more and more scholars.In this paper,quantum watermarking technology and wavelet transform are organically combined to better solve the problem of image watermarking embedded extraction.The foundation of quantum image watermarking research is to have a reasonable quantum image representation and storage mode,and then to establish a basic quantum image processing algorithm.Finally,based on the above two points,the embedding and extraction process of quantum image watermarking can be carried out.In this paper,based on the research results of scholars,an image watermarking algorithm based on quantum Daubechies Db4 wavelet is proposed.further proposed based on quantum Daubechies Db4 wavelet image watermarking algorithm.This paper first describes the development process of wavelet transform,the research status of quantum image representation and the development and research status of image watermarking algorithm.Then the basic knowledge of FRQI quantum image representation,quantum bit gate and Daubechies wavelet required by the paper is introduced.Secondly,the design of quantum circuit using quantum Daubechies Db4 wavelet transform to decompose FRQI quantum image and the segmented quantum watermarking algorithm based on quantum Daubechies Db4 wavelet transform are given.Firstly,the classical image is represented in the form of quantum image,and then it is 1st-decomposed by using Daubechies Db4 wavelet transform.Finally,the quantum watermarking information is inserted into the high frequency diagonal wavelet coefficients.It has little influence on carrier image,and has strong embedding capacity and quality.