Watermarking Algorithm Using Wavelet Transform for GIS Video Data

A new digital watermarking algorithm using wavelet transformation for video GIS data was proposed.In the watermark embedding scheme,firstly,the original watermark was changed into a binary image matrix and scrambled.Secondly,the points selected form the video frame feature could be formed into a two-dimensional matrix and taken the wavelet transformation.The low-frequency coefficients were selected to embed the watermark using the quantify method.Finally,the inverse wavelet transformation was taken to replace the original feature points.In the watermark detecting scheme,the optimal watermark information was detected using by the fusion of the watermarks which had been detected from the continuous sequence of images on the timeline and the model.Experimental results show that the algorithm has good invisibility and robustness,and could effectively resist the remove of the frame,re-encoding.