An Improved Digital Watermarking Algorithm for Meaningful Image

Aimed at some weaknesses of the traditional watermarking algorithms, this paper presents an improved watermarking algorithm for meaningful image. The discrimination rate of image watermarking can be improved by processing the image with the Arnold transformation and the correlation detection, multiplying the spectrum of the watermarking with the pseudo-random series, the pseudo-random series was taken out by the private key. The proposed watermarking algorithm has better performance than others in three aspects, including ANT-JPEG compression, ANT-shear, and ANT-zoom.