Research on Digital Watermarking Technology Based on MATLAB

Abstract

With the rapid development of digital multimedia technology and Internet technology, the copyright protection of multimedia products has become a very important and challenging research topic at present. Digital watermarking technology is an effective method to realize the copyright protection of digital products, and it has become a hotspot in the field of information protection and information hiding. In this paper, DWT and LSB algorithm are adopted to realize the embedding and extraction of digital watermark through Matlab, after comparing the digital watermarking image under the Gaussian noise, salt and pepper noise, cutting and rotating attacks, the effect of two algorithms to extract digital watermarking image, the results show that: NC values (0.5067, 0.7584, 0.2301, 0.1330) and subjective ratings (3, 4, 2, 2) of DWT algorithm are superior to LSB algorithms (NC values are 0.0965, 0.7005, 0.5507, 0.0567, and subjective ratings are 1, 4, 3, 1). The DWT algorithm has better attack resistance and provides reference for the application of digital watermarking.