Detection of Firmiana danxiaensis Canopies by a Customized Imaging System Mounted on an UAV Platform

Table 4

The equation and description of index.

Type	Index	Equation and description of index
Texture	GLCM_homogeneity
	GLCM_contrast
	GLCM_dissimilarity
	GLCM_Entropy
Geometry	Shape index
	Density

P_i,j is the probability of a gray level pair, i and j, in the GLCM defined by a position operator, and I and J are the maximum values given in each dimension of GLCM, respectively. e and A were the perimeter and area, respectively, of the targeted patch, n was the number of pixels, and and were the width and length of the bounding box of the patch.