%0 Conference Proceedings
%4 sid.inpe.br/marte2/2017/10.27.15.45
%2 sid.inpe.br/marte2/2017/10.27.15.45.05
%@isbn 978-85-17-00088-1
%F 60072
%T Detecção automática de fustes em povoamentos florestais usando laser scanner terrestre
%D 2017
%A Almeida, Gustavo Jose Ferreira de,
%A Conto, Tiago de,
%A Hamamura, Caio,
%A Rodriguez, Luiz Carlos Estraviz,
%@electronicmailaddress gjfalmeida@gmail.com
%E Gherardi, Douglas Francisco Marcolino,
%E Aragão, Luiz Eduardo Oliveira e Cruz de,
%B Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)
%C Santos
%8 28-31 maio 2017
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 6320-6327
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%X LiDAR (Light Detection and Ranging) is a technology gaining worldwide acceptance as precise method for generating 3D models of surfaces and objects, as well as for forests. TLS, or terrestrial laser scanning, is a method of LiDAR data generation which uses a laser scanning device at floor level. The objective of this paper was to evaluate the capacity of algorithms based on Hough transformation to automatically detect stems within a point cloud originated from TLS survey. The study was held in southeastern Brazil in two different stands with Pinus baramensis and Eucalyptus sp with 23 and 7 years old, respectively, and two pixel sizes and five different heights were considered to evaluate the precision of the method regarding to percentage of stems detected. The results showed that the higher the raster was generated along z axis the higher the % os stems detected for both species. It was also shown that pixel size of 5 cm resulted in higher stem detection in comparison to 10 cm sized pixel. For Pinus baramensis there was no statistically difference between pixel sizes (p < 0,05); for Eucalyp0tus sp, on the other hand, 5 cm pixel size showed higher performance on stem detection than 10 cm sized pixels (p < 0,05). The authors suggest that further studies must be carried to consistently evaluate the effect of TLS data on higher heights inside forest stands in order to minimize the effect of under-canopy vegetation on TLS data collection.
%9 LIDAR: sensores e aplicações
%@language pt
%3 60072.pdf