Abstract:

Canopy height model (CHM) is the difference between canopy surface model with digital elevation model, which is forest resources inventory important data. The author proposed CHM segmentation based on marker controlled watershed algorithm. Firstly, the author used the Gaussian filter smooth CHM, obtained the crown edge; secondly, the author affirmed the crown shape by morphological reconstruction, and then exploited distance and h-minima transform to label treetop; lastly, used watershed algorithm segment CHM and outlined the canopy edge. Experimental results were provided to illustrate this method, which could effectively improve the recognition accuracy, the segmentation accuracy was 78.5% when parameter b and h was 3 and 1.5, respectively.