基于环境小卫星的土壤线提取研究

通过对自动提取算法的分析研究,对土壤线提取流程进行改进,在引入了植被指数的基础上,剔除了大部分水体尤其是水库等深层水的影响,对土壤线自动提取流程进行了改进。通过与实际土壤线进行对比发现两者偏差较小,模型具有较高的精度和稳定性。通过将该方法应用于干旱监测模型PDI中,结果显示在不影响精度的前提下,该方法提高了模型的运算效率。

Study on the Soil Line Deriving based on HJ Satellites

The soil line was usually used in vegetation detection,soil properties and drought monitoring.In the traditional method,the soil line is manually derived with low efficiency and large variability.Recently ,aimed to solve these problems,QIN Qiming,FOX et al.proposed an soil line automatic identification method,but it didnt take the water into consideration,especially the reservoir.Based on the analysis of their method,the method was developed by introducing the vegetation index to decrease the effect of water,and proposed the adjust soil line automatic identification method.In the comparison with real soil line,the differences is small,and the method was proved to a accurate and stable way.Used in the drought monitoring,PDI,the result showed that the method improved the effecient of the model.