A blind digital watermarking algorithm based on wavelet transform

Abstract

In recent years, digital watermarking technology is a frontier research area in academia, which is proposed to deal with copyright protection problem in a network environment. In the paper, a blind digital watermarking algorithm based on wavelet transform is proposed. After wavelet transform, we get the wavelet coefficients of a image. According to the Euclid distance between every two coefficients, all wavelet coefficients are classified into several classes. Then watermark is embedded into some fit coefficients. It needn't the original image in the process of extracting watermarking, so it is a blind watermarking algorithm. The experimental results show that it is a highly robust algorithm against JPEG compress, the addition of noise, median filtering and cropping.