基于资源三号的雷州半岛红树林种间分类研究

郑艺, 林懿琼, 周建, 甘伟修, 林广旋, 许方宏, 林光辉

Mangrove inter-species classification based on ZY-3 image in Leizhou Peninsula, Guangdong Province

Yi ZHENG, Yiqiong LIN, Jian ZHOU, Weixiu GAN, Guangxuan LIN, Fanghong XU, Guanghui LIN

表2 用于红树林种间分类的遥感影像特征变量

Tab.2 Features of remote sensing imagery used in mangrove inner-species classification

特征变量		变量描述
原始单波段		B1—B4
波段组合	B2,B3		B2+B3
	B1,B4		B1+B4
	B1,B2,B3		B1+B2+B3
	B2,B3,B4		B2+B3+B4
植被指数	NDVI		$NDVI = \frac{B 4 - B 3}{B 4 + B 3}$
	NDWI		$NDWI = \frac{B 4 - B 2}{B 4 + B 2}$
	简单比值植被指数		$RVI = \frac{B 4}{B 3}$
	增强型植被指数		$EVI = 2.5 (\frac{B 4 - B 3}{B 4 + 6 B 3 - 7.5 B 1 + 1})$
纹理参数	均值		$ME = \overset{N}{\sum_{i, j = 1}} i \cdot P_{i, j}$
	方差		$VAR = \overset{N}{\sum_{i, j = 1}} P_{i, j} {(i - ME)}^{2}$
	均匀度		$HOM = \overset{N}{\sum_{i, j = 1}} \frac{P_{i, j}}{1 + │i - j│}$
	对比度		$CON = \overset{N}{\sum_{i, j = 1}} {(i - j)}^{2} \cdot P_{i, j}$
	相异性		$DIS = \overset{N}{\sum_{i, j = 1}} P_{i, j} │i - j│$
	信息熵		$EN = \overset{N}{\sum_{i, j = 1}} P_{i, j} (- \ln P_{i, j})$
	二阶矩		$SM = \overset{N}{\sum_{i, j = 1}} {P_{i, j}}^{2}$
	相关度		$COR = \overset{N}{\sum_{i, j = 1}} \frac{(i - ME) (j - ME) {P_{i, j}}^{2}}{VAR}$