Watermarking embedding and extraction method based on the robust multi-scale space

The present invention relates to a watermark embedding and extraction method based on multi-scale robust space. The method comprising: constructing a multi-scale space; multiscale Watermarking: Multiscale watermark generation and watermark embedding multiscale; multiscale watermark extraction: extracting feature points, multi-scale spatial orientation, multi-scale spatial watermark extraction; watermark contrast. Limitation of the current image watermarking method of the present invention is directed to large-scale attack geometric transformation, multi-resolution block by pyramid data structure divided into a large-scale multi-level attack small-scale attacks, organic binding domain and the spatial domain transform together to ensure invisibility and robustness of the watermark information in the case of large-scale geometric attacks. Compared to conventional digital watermarking method, on the premise of the same watermark capacity, the present invention has better imperceptibility and robustness advantages for large-scale geometric transformation.