Research on Digital Watermarking Algorithm Based on Discrete Wavelet Transform
The Internet has been popularized in people's daily life and work,and the development of multime-dia information exchange has shown unparalleled breadth and depth,which leads to a series of problems,such as copyright infringement and tampering.Therefore,people pay more attention to the protection of copyright.Informa-tion hiding technology is the most commonly used technology to protect copyright,and digital watermarking technol-ogy has been widely used.This paper introduces the digital watermarking technology and its development,de-scribes the typical algorithms and models of the digital watermarking technology,simulates the embedding and ex-traction of the watermark,observes the original image and the image after embedding the watermark,and finds out the difference between extracting the original watermark and the extracted watermark.Finally,after JPEG compres-sion,cutting and rotation of the image,the anti-attack ability of the embedded watermark image is studied.
万方数据
维普
