Table 1 Description of the objective indices
Dimension | Indices | Indices description |
|---|---|---|
Natural | GVI | The ratios of vegetation pixels (tree, grass, plant, mountain/hill) to the total pixels in the image |
WVI | The ratios of water pixels to the total pixels in the image | |
SKVI | The ratios of sky pixels to the total pixels in the image | |
Artificial | HVI | The ratios of hard ground pixels (floor, road, sidewalk, earth/ground, rock) to the total pixels in the image |
BVI | The ratios of buildings pixels to the total pixels in the image | |
OVI | The ratios of other elements pixels (person, car/van/minibike/boat /bus/truck/train, fence/wall, column/signboard/awning/streetlight /airplane/pole) to the total pixels in the image |