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Ecopersia، جلد ۵، شماره ۳، صفحات ۱۸۳۷-۱۸۴۷
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Extraction of Individual Tree Parameters by Using Terrestrial Laser Scanner Data in Hyricanian Forest
چکیده انگلیسی مقاله Background: In this study for the first time terrestrial laser scanning survey was implemented on upland Hyrcanian forest, through which a and new method was applied to automatically extract DBH and tree position as a necessary step for height calculation and fitting the clustering as a circle. Materials and Methods: Tree height extracted by fixing a cylinder around the trees center. The accuracies of these methods were investigated by field measurement. Among 4 shapes fitting algorithm, Monte Carlo had more suitable result to fitting circle in each height above the ground. Results: Tree detection rates were 85% for Carpinus betulus and 87% for Diyospyrus lotus with respect to field measurement. R2 and RMSE for DBH measurement were 0.98, 2.06 cm for Carpinus betulus and 0.98, 1.26 cm for Diyospyrus lotus. Value of R2 and RMSE for height measurement were 0.96, 3.37 meters and 0.93, 3.02 meters for Carpinus betulus and Diyospyrus lotus, respectively.             Conclusions: The accuracy of DBH by TLS is very suitable, and about the height of trees we extracted underestimated value in comparison to field measurement and that we need to develop more effective algorithms in order to reach more accurate measurement of trees' height in Hyrcanian forest.
کلیدواژه‌های انگلیسی مقاله Breast height, DTM, Forest inventory, LIDAR, Point cloud
نویسندگان مقاله اکبر نجفی |
ph.d. student, department of forestry, faculty of natural resources, tarbiat modares university, noor, iran
سازمان اصلی تایید شده: دانشگاه تربیت مدرس (Tarbiat modares university)

ایمان پژوهان |
associate professor, department of forestry, faculty of natural resources, tarbiat modares university, noor, iran
سازمان اصلی تایید شده: دانشگاه تربیت مدرس (Tarbiat modares university)

ابوالقاسم روحانی |
associate professor, faculty of mining, petroleum and geophysics, shahrood university of technology, shahrood, iran
سازمان اصلی تایید شده: دانشگاه صنعتی شاهرود (Shahrood university of technology)

جواد وحیدی |
associate professor, computer engineering department, iran university of science and technology, tehran, iran
سازمان اصلی تایید شده: دانشگاه علم و صنعت ایران (Iran university of science and technology)

نشانی اینترنتی http://ecopersia.modares.ac.ir/article_17645_d23678275490d005ca99864cdfad4826.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/391/article-391-432527.pdf
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زبان مقاله منتشر شده en
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