Abstract: In order to find suitable multispectral images and fusion methods for the pan-sharpening of TH-1 panchromatic images, IHS, Wavelet, PCA, P+XS, Brovey five transformation methods were used to separately fuse TH-1 PAN with TH-1 MS, TM MS and ETM MS, and the fusion results were assessed from visual and quantitative aspects. Results show that TH-1 PAN and TH-1 MS fusion combination have the best quality; Wavelet transformation can keep the best spectral information, P+XS and Wavelet transformation can keep the best spatial information, and Brovey and IHS can get the best overall quality.

Key words: TH-1, image fusion, fusion quality assessment