CAJ | 학술논문

为了论证Landsat TM 与 HJ CCD影像植被指数间的相关关系,首先将多对同日过境的环境与灾害监测预报小卫星(HJ 1A/1B)CCD1/CCD2影像及Landsat TM影像的灰度值转换成表观反射率,然后针对不同的土地利用类型影像,通过回归分析建立二者归一化植被指数( normalized difference vegetation index,NDVI)之间的定量关系,计算二者的转换方程,分析二者间的差异。结果表明,HJ CCD及Landsat TM影像的植被指数之间具有显著的线性正相关关系,转换方程的转换精度较高。
위료론증Landsat TM 여 HJ CCD영상식피지수간적상관관계,수선장다대동일과경적배경여재해감측예보소위성(HJ 1A/1B)CCD1/CCD2영상급Landsat TM영상적회도치전환성표관반사솔,연후침대불동적토지이용류형영상,통과회귀분석건립이자귀일화식피지수( normalized difference vegetation index,NDVI)지간적정량관계,계산이자적전환방정,분석이자간적차이。결과표명,HJ CCD급Landsat TM영상적식피지수지간구유현저적선성정상관관계,전환방정적전환정도교고。
In order to demonstrate the correlativity of the vegetation indexes between Landsat TM and HJ CCD imageries, the authors first conducted the conversion from gray values of multi - spectrum bands to apparent reflectance for several pairs of Landsat TM and HJ CCD imageries. The quantitative relationship of normalized differential vegetation indexes between the two imageries was established through regression analysis in the light of different land cover types. At last, the conversion equation was calculated and the difference between the two kinds of data was analyzed. The result shows that vegetation indexes between Landsat TM and HJ CCD have significant linear positive correlation, and the conversion precision of the transformation equation is reasonably high.