Research on the Normal Cloud Model Watermarking

Cloud model is introduced in the filed of watermarking in this paper,one-dimensional normal cloud is used as watermarking sequence and be embedded into image's larger DCT coefficient.The theory of similar cloud and its measurement is introduced to test the robustness of the proposed scheme.Cloud model and its related theories are successfully applied in the field of watermarking by the experimental data.Even though some drops of the cloud are varied by image processing,we can draw the qualitative conclusion of extracted cloud sequence by calculating similarity with three characteristic parameters and similar cloud algorithm.