TAVI与地形校正后NDVI抗地形影响比较

Topographic elimination performance comparison between TAVI and NDVI after topographic correction

为了比较TAVI与地形校正方法的抗地形效果,利用福建省福州市连江县地区Landsat 8 OLI卫星数据,配合使用相对应的DEM数据,采用目前广泛运用的C校正、SCS+C校正、SCS校正、Cosine校正等4种地形校正方法.从校正后影像的目视分析、均值和标准差参数的统计结果,太阳入射角余弦值与影像各波段的相关性等方面对校正结果进行了对比分析.选取最优的C校正模型,计算校正结果的NDVI,从多方面与TAVI进行抗地形效果的对比,得出TAVI的抗地形效果最好.

In order to compare the topographic elimination performance between TAVI and topographic correction method,applying Landsat 8 OLI image data and DEM data of Lianjiang district in Fuzhou,Fujian Province,with four topographic correction models,like C correction model,SCS＋C correction model,SCS correction model,Cosine correction model. From the visual analysis,mean value and standard deviation parameters of the corrected image,the correlation between the cosine of the incident angle of the sun and the correlation of each band of the image is analyzed. The optimal C calibration model was selected to calculate NDVI of the correction results. Contrast topographic elimination performance from several aspects,the results show that the topographic elimination performance of TAVI is better than C correction.