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. 2008 Aug 25;8(8):5037–5054. doi: 10.3390/s8085037

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© 2008 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.

This article is an open-access article distributed under the terms and conditions of the CreativeCommons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 3. — An example of the effects of smoothing intensity. There is an unsmoothed CHM in the background. Trees measured in the field are marked with circles of a size related to their DBH. The boundaries of the canopies are the result of the segmentation. A large aspen has been marked with an A and local maxima are marked with triangles. The smoothing parameter σ had the value 0.40 in the lowest height class and 2.20 in the highest in the left-hand image, the corresponding σ-values in the right-hand image being 0.40 and 1.20.