Extraction of Individual Tree Height Using a Combination of Large-Scale Aerial Photo and LiDAR

Abstract:

With the LiangShui forestry centre as study area, high-density LiDAR data and to synchronously processed high-resolution digital image are taken as data source to extract Individual Tree Height. The LiDAR data of the study area is filtered and classified, using TIN Filter to extract the ground echo points and trees echo points. Then these ground echo points generate Digital Elevation Model (DEM), and these trees echo points generate Digital Surface Model (DSM). Then the DEM and DSM are Taken as a subtraction to obtain Canopy Height Model (CHM), then the object-oriented approach is used to segment air digital image. Through multi-scale and canopy-model which create image objects and class division level, with the nearest neighbor distance and member function, the image objects are classified, and re-segmentation is based on classification results. And the edge is optimized to accurately identify individual tree. The canopy polygon obtained after image segmentation and CHM were superimposed to calculate polygon maximum elevation difference from LiDAR data as a tree height. Associated with the measured height analysis, the accuracy is 92.04%.

• Periodical: Advanced Materials Research (Volumes 268-270)
• Pages: 1157-1162
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.268-270.1157
• Online since: July 2011
• Authors: Ping Wang, Wen Yi Fan, Ming Ze Li, Fang Liu, Qiong Zhang
• Keywords: Aerial Photo, LiDAR, Modeling, Multi-Scale Segmentation, Tree Height

References

[1] Zhou Shufang: Study of individual tree height Extraction based on LiDAR and aero Photograph, Dissertation, Northeast Forestry University, (2007).

[2] Zhao Feng, Pang Yong: Extraction of Individual Tree Height Using a Combination of Aerial Digital Camera Imagery and LiDAR. SCIENTIA SILVAE SINICAE, Vol. 45(10), pp.81-87, (2009).

[3] Liu Qingwang, Li Zengyuan: Extracting height and crown of individual tree using airborne LIDAR data. JOURNAL OF BEIJING FORESTRY UNIVERSITY, vol. 30(6), pp.83-89, (2008).

[4] Zhao Feng: Forest Parameter Extraction Using LiDAR Data and Digital Camera Image, Dissertation, Chinese Academy of Forestry, (2007).

[5] Juan C. Suarez, Carlos Ontiveros, Steve Smith, Stewart Snape: Use of airborne LiDAR and aerial photography in the estimation of individual tree heights in forestry. Computers&Geosciences, vol. 31, pp.253-262, (2005).

DOI: 10.1016/j.cageo.2004.09.015