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以内蒙古自治区太仆寺旗为研究区,基于Landsat 8 OLI遥感影像,采用数学形态学方法构建了太仆寺旗人工草地提取模型.对内蒙古自治区太仆寺旗2013年8月23日的遥感影像进行了几何精校正、辐射定标、大气校正等预处理,并进行了归一化植被指数NDVI计算.在分析太仆寺旗人工草地几何特征的基础上,采用数学形态学方法对NDVI梯度图像进行了边缘检测,得到了边缘NDVI梯度图,并对其进行了二值化处理.基于圆环形结构元素构建了太仆寺旗人工草地提取模型,从NDVI梯度图的二值图像中提取了形状规则的圆形人工草地,并与太仆寺旗人工草地实际数目与面积进行了比较.结果表明,提取数目精度达到93.73%,提取面积精度达到92.16%,说明本文提出的基于遥感影像与数学形态学的人工草地提取模型,可有效地提取太仆寺旗的人工草地.
Taking Taipusiqi Banner of Inner Mongolia Autonomous Region as study area, the artificial grassland extraction model of Taipusiqi Banner was constructed based on Landsat 8 OLI remote sensing image.Meanwhile, the geomorphologic calibration and calibration of remote sensing images of Taipusiqi Banner in Inner Mongolia Autonomous Region were conducted. , Atmospheric correction and so on, and normalized vegetation index NDVI was calculated.Based on the analysis of geometric characteristics of Artificial Grassland in Taipusi Banner, the edge NDVI gradient image was detected by mathematical morphology method, and the edge NDVI gradient map was obtained, Based on the circular structure element, the artificial grassland extraction model of Taipusiqi was built, the circular artificial grassland with regular shape was extracted from the binary image of NDVI gradient graph, and was compared with the actual number of artificial turf The results showed that the accuracy of the extraction was 93.73% and the precision of the extraction area was 92.16%, which indicated that the artificial grassland extraction model based on remote sensing images and mathematical morphology proposed in this paper could extract the artificial grassland of Taipusi Banner effectively.