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LiDAR-based forest visualization.

Fujisaki, Ikuko.

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LiDAR-based forest visualization.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	LiDAR-based forest visualization./
作者:	Fujisaki, Ikuko.
面頁冊數:	144 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-04, Section: B, page: 1806.
Contained By:	Dissertation Abstracts International66-04B.
標題:	Agriculture, Forestry and Wildlife. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3171404
ISBN:	054208094X

LiDAR-based forest visualization.
Fujisaki, Ikuko.

LiDAR-based forest visualization. - 144 p.

Source: Dissertation Abstracts International, Volume: 66-04, Section: B, page: 1806.

Thesis (Ph.D.)--Mississippi State University, 2005.

Viewer estimations of stand characteristics from computer-visualized stands were examined through two experiments to study utility of forest visualization to portray stand properties. In the first experiment, the viewers examined field videos or computer-visualized stand simulations based on a high-level-of-detail graphic tree model with a two dimensional screen. In the second experiment, the viewers examined computer-visualized stands based on LIDAR measured data depicted with low-, medium-, and high-level-of-detail tree models in the Cave Automatic Virtual Environment, a room-size stereoscopic display. Results indicated that accurate levels of representation of computer visualized outcomes depended on assessed properties and stand type. LIDAR-based virtual forests characterized relatively well tree spacing, stem density, live crown ratio, relative stocking, structure, and hardwood competition, but differences in viewer's interpretation in diameter at breast height, crown dimension, and stage in rotation were found in at least one examined stand. The results also indicated that level of model did not affect either the viewer's stand descriptions for most of the characteristics or navigational efficiency as measured by number of rendered trees during interactive navigation process and interaction time. However, a simplified model may not represent stand structure sufficiently. Studies of benefit/cost and interface, such as development of devices that are imposed on the user when interacting with a virtual environment, are necessary to transfer this technology to practical use.

ISBN: 054208094XSubjects--Topical Terms:

783690
Agriculture, Forestry and Wildlife.

LiDAR-based forest visualization.
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502 $a Thesis (Ph.D.)--Mississippi State University, 2005.
520 $a Viewer estimations of stand characteristics from computer-visualized stands were examined through two experiments to study utility of forest visualization to portray stand properties. In the first experiment, the viewers examined field videos or computer-visualized stand simulations based on a high-level-of-detail graphic tree model with a two dimensional screen. In the second experiment, the viewers examined computer-visualized stands based on LIDAR measured data depicted with low-, medium-, and high-level-of-detail tree models in the Cave Automatic Virtual Environment, a room-size stereoscopic display. Results indicated that accurate levels of representation of computer visualized outcomes depended on assessed properties and stand type. LIDAR-based virtual forests characterized relatively well tree spacing, stem density, live crown ratio, relative stocking, structure, and hardwood competition, but differences in viewer's interpretation in diameter at breast height, crown dimension, and stage in rotation were found in at least one examined stand. The results also indicated that level of model did not affect either the viewer's stand descriptions for most of the characteristics or navigational efficiency as measured by number of rendered trees during interactive navigation process and interaction time. However, a simplified model may not represent stand structure sufficiently. Studies of benefit/cost and interface, such as development of devices that are imposed on the user when interacting with a virtual environment, are necessary to transfer this technology to practical use.
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