基于Landsat-8 OLI的农作物信息提取研究——以安徽省蚌埠市为例

Research on Crops Information Extraction in Bengbu City Based on Landsat-8 OLI

针对安徽省蚌埠市农作物水旱交错的特点,提出利用多时相中分辨率遥感影像,基于农作物的物候期特征选择合适的影像数据,采用面向对象的分析方法,构建水旱交错区农作物信息提取模式,进行农作物信息提取。蚌埠市农作物信息提取实验表明,该方法简单易行,有效避免了"椒盐现像",总体分类精度达91.7%,对于准确了解水旱交错地区农作物的面积及其分布情况,具有重要的应用价值。

According to the staggered distribution characteristics of crops in Bengbu City, an extraction mode was established by using multi-temporal medium-resolution images. By analy- zing the spectral characteristics and time series NDVI of main crops, the proper extraction fea- tures and the optimum temporal images were selected. Then, an extraction mode based on ob- ject-based information analysis method was established. The experimental results show that the extraction total accuracy of crops information reached up to 91.7~. Using this method one can avoid ＂salt and pepper phenomenon＂ and monitor the distribution of crops in transitional zone of Qinling-Huahe correctly and efficiently.