Based on SPOT5 panchromatic images and Landsat ETM+multi-spectral images,this paper used the band characteristics analysis method and improved optimum index factor method to determine the best fusion band,and selected five kinds of image fusion methods including HSV transform,Brovey transform,principal component analysis transform,Gram-schmidt transform and wavelet transform to fuse images.The paper used the quantitative evaluation method to evaluate the fused image quality,and then built the classification...