【摘要】 ETM+与SPOT-5Pan融合影像是地质灾害调查的理想数据源。ETM+多光谱图像与SPOT-5Pan图像的空间分辨率相差悬殊,直接融合可能导致融合影像色彩模糊、色调不和谐等问题;若将ETM+与其全色融合后再与SPOT-5Pan融合,如果融合方法不当亦会造成光谱信息的过多损失。以金沙江上游某库区地质灾害遥感调查为例,采用Brovey变换法I、HS变换法和PCA变换法分别对ETM+和SPOT-5Pan进行了直接和间接融合,并采用主观评定与水平光谱剖面相结合的方法对融合影像进行了评价,通过野外调查对解译结果进行了校验,结果表明ETM+与SPOT-5Pan(PCA变换融合)融合影像地质灾害解译的准确率达92%。更多还原

【Abstract】 The study area in this paper,the reservoir area of a hydropower station located on the upstream of the Jinshajiang River,is characterized by high relief and inaccessibility.ETM+ and SPOT-5 Pan are used as the remote sensing data source.However,the spatial resolution of SPOT-5 Pan is much higher than that of ETM+ multi-spectral images,and therefore,a suitable fusing method should be selected to fuse SPOT-5 Pan with ETM+ images to obtain a fused image with high spatial and spectral resolutions.In this paper,a comparison has been made between various fusing methods,including IHS,Brovey and PCA transformation methods.Subjective appraisal and horizontal spectral profile have been adopted to assess the quality of the fused images.Also field survey has been taken to find the interpretation veracity.更多还原