最近老师让做遥感图像处理与解译，好多知识都不会，所以呢，就把学习过程中遇到的名词查阅相关资料进行总结，也算是对自己有督促作用。
Vegetation Index
参考：https://articles.extension.org/pages/40072/what-does-vegetation-index-mean-in-remote-sensing-technology
A vegetation index (also called a vegetative index) is a single number that quantifies vegetation biomass and/or plant vigor for each pixel in a remote sensing image. The index is computed using several spectral bands that are sensitive to plant biomass and vigor. The most common vegetation index is the normalized difference vegetation index (NDVI). NDVI compares the reflectance values of the red and near-infrared regions of the electromagnetic spectrum using the following formula: NDVI=NIR-RED/NIR+RED NIR is the pixel's reflectence value in the near-infrared band RED is the pixel's reflectence value in the red band The NDVI value, which ranges from -1.0 to 1.0 for each pixel in an image, helps identify areas of varying levels of plant biomass/vigor. Higher values indicate high biomass/high vigor.
（先把英文贴进来，后面进行翻译）