A Fast Statistical Method of Tree Information from 3D Laser Point Clouds

Table 1. Analysis of cross contrast
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Table 1. Analysis of cross contrast
Group Section1 /m Section2 /m Sectiondistance /m Numberof trees
1 1.3 1.6 0.3 13
2 1.3 1.4 0.1 20
3 1.3 1.2 0.1 18
4 1.3 1.1 0.2 15
5 1.3 1.0 0.3 13
6 1.3 0.8 0.5 13
7 1.3 0.6 0.7 13
8 1.3 0.4 0.9 11

Table 2. Measurement result

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Table 2. Measurement result

Tree	x /m	y /m	Laser estimatedDBH /m	Actual measuredDBH /m	Absoluteerror /m	Relativeerror /%
1	0.3524	2.4320	0.224	0.187	0.037	19.8
2	4.4130	1.9165	0.615	0.590	0.025	4.2
3	4.4510	4.4867	0.725	0.742	0.017	2.3
4	4.4772	6.7731	0.478	0.497	0.019	3.8
5	3.2801	16.4614	0.654	0.662	0.008	1.2
6	0.9541	22.6060	0.313	0.340	0.027	7.9
7	9.3603	10.4821	0.123	0.174	0.051	29.0
8	13.0395	9.7228	0.095	0.156	0.061	39.2
9	12.5228	12.6198	0.065	0.185	0.120	64.9
10	16.1268	16.7897	0.286	0.309	0.023	7.4
11	19.2367	8.7498	0.549	0.568	0.019	3.4
12	24.6582	11.0337	0.199	0.229	0.030	13.1
13	23.9972	23.4266	0.280	0.276	0.004	1.5

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Xiao Yang, Hu Shaoxing, Xiao Shen, Zhang Aiwu. A Fast Statistical Method of Tree Information from 3D Laser Point Clouds[J]. Chinese Journal of Lasers, 2018, 45(5): 510007

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