本研究分别针对NDVI和EVI建立相对辐射校正回归模型,对被校正影像进行辐射归一化处理。选择不变点群法对两时相影像的NDVI和EVI进行相对辐射校正。EVI对于植被类型的分辨很敏感但是它受阴影的影响,而NDVI对于减小阴影的影响很显著。本研究方法简单有效并且能为土地利用变化监测以及对植被类型的粗略分类提供基础。 In this study, relative radiation correction regression models were established respectively for NDVI and EVI, and the corrected images were normalized by radiation. The invariant point cloud method is used to make the relative radiation correction of NDVI and EVI of two-phase images. EVI is sensitive to the resolution of vegetation types but it is affected by shadows, whereas NDVI has a significant impact on shadow reduction. The method is simple and effective and can provide a basis for monitoring the change of land use and the rough classification of vegetation types.