中文摘要：

遥感影像的大气校正是遥感数据应用的基础．文章利用ENVI软件的FLAASH大气校正模块，对Hype—rion高光谱遥感影像进行大气校正，选取典型地物对校正效果进行评价．主观定性评价结果显示校正后的影像地物边界更清楚、对比度增强；光谱曲线对比分析显示，校正前后光谱曲线形状完全不同，林地的反射率图像的光谱曲线形状与USGS标准库的曲线类似；典型地物影像质量的指标评价结果表明，校正后图像的平均梯度值基本都大于校正前影像的值；信息熵的值正好相反，大气校正的效果明显，进一步证实FLAASH模块各参数设置的合理性．

英文摘要：

Owing to system and occasional errors, atmospheric correction is the basis of application of remote sensing images. Based on FLAASH model in ENVI4.5, the paper implemented atmospheric correction to one scene image of Hyperion data and evaluated the quality of corrected image. Firstly, the boarders between both land cover types were made more clearly from each other in processed images than that in raw images. The local contrast was enhanced from raw images to corrected images. Secondly, double spectral curves of images demonstrated the obvious difference, while spectral curve for forest was similar to that from standard spectral library of USGS. Lastly, both indices of Average Gradient and Shannon were calculated for four typical objects, including forest, water, transportation and urban land cover. Average Gradient gave a good evidence for the effect of atmospheric correction by larger values for corrected images. Shannon had adverse values and gave an indirect check. All in all, image quality evaluation showed that the atmospheric correction method was a likely solution to eliminate the influence of atmosphere on remote data, while the model and parameters selected were corret.