CAJ | 학술논문

以浙江省余杭区土地利用类型变化为研究对象,利用1994年与2008年2期TM影像,通过光谱直接比较法获取7种变化差异图像,并采用基于Kappa系数的双阈值搜寻算法和双窗口变步长阈值搜寻算法分别计算变化阈值,从而得到变化/未变化二值图。最后采用精度检验法表明,利用主成分差值法获得的差异图像并采用双窗口阈值法确定其变化阈值可以比较地提取变化信息。
이절강성여항구토지이용류형변화위연구대상,이용1994년여2008년2기TM영상,통과광보직접비교법획취7충변화차이도상,병채용기우Kappa계수적쌍역치수심산법화쌍창구변보장역치수심산법분별계산변화역치,종이득도변화/미변화이치도。최후채용정도검험법표명,이용주성분차치법획득적차이도상병채용쌍창구역치법학정기변화역치가이비교지제취변화신식。
Using two TM images of Yuhang District in 1994 and 2008,we got change images by seven methods of comparing spectrum directly.Then we separately calculated the change threshold using the method based on Kappa coefficient or the double-window variable step search threshold algorithm.Precision examination of the change / not change-binary image showed that the change image obtained by the method of principal component using the double-window variable step search threshold algorithm was with higher precision for extraction of change information.