Abstract: An algorithm that watermark is embedded to remote sensing images to protect their copyright was proposed.Algorithm combined data fusion technology with digital watermarking technology. First, panchromatic image was decomposed using wavelct and edge feature of the third approximation coefficient was extracted. PCA transform was done on the edge feature getting the first principal component as watermark, and then the watermark was embedded in detail coefficient In the end, approximation coefficient and changed detail coefficients were constructed to obtain the image having watermark. Finally,panchromatic image that container watermark was fused with multispectral image using the wavelet transform and PCA fusion method. When extracting watermark, independent component analysis(ICA) method was used. The algorithm can protect the copyright of remote sensing images and certificate authenticity, also does not destroy the original information and characteristics of remote sensing images. Experiment results show that the algorithm is feasible and effective.

Key words: Watermark, Data fusion, Wavelet transform, Remote sensing image, ICA, PCA