Digital watermarking algorithm based on discrete cosine
Jiachun Wang · Electronic Design Engineering · 2013
In this paper,we study the basic principle of the digital watermark and the basic knowledge of the image processing.Achieve watermark based security,robustness and invisibility purposes,the use of a robust watermark algorithm based on discrete cosine transform,the algorithms to 8*8 the image block DCT transform on the block after images,watermark information embedding to the selected frequency after relations between coefficient.Finally,the combination of simulation and experimental results for further analysis and study,indicating that this robust Watermarking algorithm with better visibility and can be effective against a variety of attacks,such as: noise,filter,cut,and JPEG compression,and so on.