在遥感应用领域，植被指数已广泛用来定性和定量评价植被覆盖及其生长活力。由于植被光谱表现为植被、土壤亮度、环境影响、阴影、土壤颜色和湿度复杂混合反应，而且受大气空间—时相变化的影响，因此植被指数没有一个普遍的值，其研究经常表明不同的结果。-in the field of remote sensing applications, vegetation index has been widely used for the qualitative and quantitative evaluation of the growth of vegetation cover and its vitality. As the spectral performance of the vegetation cover, soil brightness, environmental impact, shadow, color and soil moisture complex mixed reaction and by the atmospheric space-phase change, vegetation index therefore not a universal value, its regular show different results.