主被动遥感特征优化的天然林森林蓄积量估测

王鹏杰,张绘芳,田昕,张景路,朱雅丽

Estimation of Forest Stem Volume of Natural Forests based on the Optimization of Active and Passive Remote Sensing Features

Pengjie Wang,Huifang Zhang,Xin Tian,Jinglu Zhang,Yali Zhu

表3 纹理信息

Table 3 Texture information

纹理	方程	简称	说明
方差	$V = \sum_{i, j = 0}^{N - 1} i ? P_{i, j} {(i - M e)}^{2}$	V_i	i=1,2，3，4，分别对应GF-6 PMS数据中的4个多光谱波段
均一性	$H = \sum_{i, j = 0}^{N - 1} i ? \frac{P_{i, j}}{1 + {(i - j)}^{2}}$	H_i
对比度	$C o = \sum_{i, j = 0}^{N - 1} i ? P_{i, j} {(i - j)}^{2}$	Co_i
相异性	$D = \sum_{i, j = 0}^{N - 1} i ? P_{i, j} \|i - j\|$	D_i
熵	$E = \sum_{i, j = 0}^{N - 1} i ? P_{i, j} (- l n ? P_{i, j})$	E_i
二阶矩	$S = \sum_{i, j = 0}^{N - 1} i ? {P_{i, j}}^{2}$	S_i
相关性	$C r = \sum_{i, j = 0}^{N - 1} i ? P_{i, j} [\frac{(i - M e) (j - M e)}{\sqrt[]{V A_{i} ? V A_{j}}}]$	Cr_i