Research And Implementation Of Digital Watermarking Technology Based On The QR Code

The rapid development of Internet technology has provided a broad platform for the application of two-dimensional bar code in our country.However,owing to the encoding publicly and the uniform standard of two-dimensional bar code,there're some disadvantages in terms of its confidentiality,which has much serious influence on its application scope.Digital watermarking is proposed to solve the problem of identification.Therefore,combining both of them effectively can greatly improve the application of two-dimensional bar code field.In addition,because two-dimensional bar code has the strong ability of error correction,embedding the two-dimensional bar code into the carrier image as a digital watermark can effectively improve the robustness of the traditional watermarking method.This article generally introduces the digital watermarking technology and the research status both at home and abroad,demonstrating the classification and the basic principle of digital watermarking,including the system model of embedding and extracting watermark,digital watermark performance evaluation standards,attacking ways,and the digital image watermarking algorithm based on DWT.Because compared with other two-dimensional bar code,QR code has a higher ability to read and takes up smaller space and has the advantage of larger capacity of information,this paper proposes a digital watermarking technology based on two-dimensional QR bar code.In order to improve the security and robustness of the watermark system,before embedding the watermark,we use Joseph scrambling transformation for QR code,then embed QR's two-dimensional bar code into the carrier image as digital watermarking using DWT algorithm and extract the watermark image.Finally,experimental results of the invisibility and robustness of the watermark are analyzed and tested,and obtain the good experimental effect.This article has combined QR two-dimensional bar code technology with digital watermark technology,improving the field of anti-counterfeiting technology oftwo-dimensional bar codes,and experimental results show that watermarking scheme has a certain practical value.All in all,it is of great research value that two-dimensional bar code and digital watermarking are combined with each other,meanwhile it improves the complementary advantages and their own application ranges.