本文报道了运用图像处理技术,分别计算河北省南皮县试区两个不同时相TM与SPOT图像的亮度指数和垂直植被指数,进而求算变化向量、自动输出变化分类图的试验研究结果。经实地对22块变化图斑进行检验,都准确无误,表明从不同时相的卫星图像提取土地利用变化信息,分析耕地消长及大宗作物种植面积波动是完全可能的,有广阔的应用前景。

This paper explains the experimental result of land use change monitoring in Nanpi county of Hebei province through applying image processing techniques. The procedure contains: A. calculating brightness index (BI) and perpendicular vegetation index (PVI) of TM and SPOT images received from different time respectively: B. manipulating a change vector in BI-PVI space; C. automatically outputing classified change monitoring image. After verificating the 22 change pieces on output image mentioned above, it has proved that the changes monitored are completely coincide with the practical situation. And it is very possiable to extract the information of land use changes by processing images received from different time and to analyse area changes of cultivated soil and staple crops. So this method could be widely used in land use change monitoring.