大气校正前后山地流域NDVI变化特征对比

程东亚, 李旭东

Comparison of change characteristics of NDVI in mountain basin before and after atmospheric correction

Dongya CHENG, Xudong LI

表1 大气校正前后NDVI分等级特征对比①

Tab.1 Comparison of NDVI classification characteristics before and after atmospheric correction

NDVI NDVINAC NDVIAC 误差/% 绝对误差/% 像元数量 占比/% 累计占比/% 像元数量 占比/% 累计占比/% [-1.0,0) 663 0.36 0.36 20 0.01 0.01 0.35 0.35 [0,0.1) 756 0.41 0.77 229 0.12 0.13 0.28 0.28 [0.1,0.2) 1 253 0.68 1.44 457 0.25 0.38 0.43 0.43 [0.2,0.3) 2 007 1.08 2.52 624 0.34 0.72 0.75 0.75 [0.3,0.4) 3 309 1.78 4.31 932 0.50 1.22 1.28 1.28 [0.4,0.5) 6 708 3.62 7.93 1 552 0.84 2.06 2.78 2.78 [0.5,0.6) 30 950 16.69 24.62 2 401 1.30 3.35 15.40 15.40 [0.6,1.0] 139 757 75.38 100.00 179 188 96.65 100.00 -21.27 21.27 合计 185 403 100.00 — 185 403 100.00 — — —