This study, we plot the original orthophoto made spatial domain linear gradation conversion, the contrast of the ground and the canopy to reinforce the [35]
This study first made a spatial domain linear grayscale transformation of the original orthophoto image to enhance the contrast between the ground and the crown of the tree.
In order to enhance the contrast between the ground and the tree crown, the linear gray-scale transformation in the spatial domain of the original image of the sample plot was first made in this study<br>