Research on Different Slicing Methods of Acquiring LAI from Terrestrial Laser Scanner Data
It has been possible to acquire precise point clouds of surface features using terrestrial laser technology. And it has been a research hot spot to figure up the LAI of a single tree combined point clouds of the tree with gap fraction model. While calculating the LAI using gap fraction model, it is a general procedure to slice the acquired point clouds. Zenith slicing and vertical height slicing are two ways often used for this purpose. We used the point clouds of a single tree with gap fraction model to determine which slicing method is better to compute the LAI, and found: (1) the results of LAI are closely related with the different slicing methods and slicing thickness; (2) the results of LAI apparently deviate from the ground truth when the slicing thickness is very big or very small; (3) the results of LAI are closer to the LAI of field measurements while the slicing thickness is smaller within the appropriate slicing range; (4) within the appropriate slicing range, the vertical height slicing is better than the zenith slicing.
Gap fraction model LAI slicing methods point clouds terrestrial laser scanner
Zhen Zhu Wuming Zhang Ling Zhu Jing Zhao
State Key Laboratory of Remote Sensing Science (Beijing Normal University),Beijing, 100875,China ;Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities, Beijing Normal University Beijing, 100875,China;School of Geography and Remote Sensing Science, Beijing Normal University, Beijing, 100875,China
国际会议
福州
英文
295-299
2011-06-29（万方平台首次上网日期，不代表论文的发表时间）