Brindusa Cristina Budei

Centre d'enseignement et de recherche en foresterie de Sainte-Foy | CERFO

The identification of individual tree species is crucial for forest inventory, carbon stocks assessment as well as for habitat and ecosystem change studies. Previous studies have shown the potential of using both the geometrical information (proportions, shape of the crown profile, etc.) and return intensities of airborne laser scanning (ALS) point...

The objective of this study was to evaluate the effectiveness of three standardization approaches for airborne laser scanning (ALS) feature values used for individual tree species classification. This study is the first effort to assess the transferability of forest tree species classification models derived using monospectral and multispectral ALS...

Identifying tree species with remote sensing techniques, such as lidar, can improve forest management decision-making, but differences in scan angle may influence classification accuracy. The multispectral Titan lidar (Teledyne Optech Inc., Vaughan, ON, Canada) has three integrated lasers with different wavelengths (1550, 1064 and 532 nm), and with...

Species classification is a cornerstone in decision-making for environmental conservation as well as for many scientific, and management activities for forest managers. The goal of this research was to explore standardization approaches for airborne laser scanning (ALS) feature values ("classification metrics"). Standardization approaches could hel...

Two major types of approaches for predicting forest attributes from remote sensing data can be schematically distinguished: plot or stand area-based approaches, and individual tree approaches. Both need calibration and verification data for their development and application. This requires expensive field sampling of a large number of plots to obtai...

Le Collectif Canopée a mandaté le CERFO afin de développer un outil cartographique de priorisation des sites de plantation sur le territoire couvert par les milieux urbains et périurbains des régions de la Capitale-Nationale et de Chaudière-Appalaches. Pour cela, une méthode d’analyse multicritère répondant spécifiquement aux besoins du projet a ét...

Avec la hausse des températures les dernières années, les effets des îlots de chaleur urbains (ICU) (températures plus élevées dans les milieux urbains que dans les zones rurales avoisinantes) devient un sujet important pour la santé humaine. La canopée est importante pour diminuer l’effet des ICU. Afin de mesurer cet effet et établir des plans d’i...

Tree species identification is important in forest management. The multispectral lidar Titan of Teledyne Optech Inc. can improve tree species separation by providing classification features computed from the three-channel intensities, ratios and normalized differences. However, the value of features used in classification algorithms (e.g., random f...

Tree species identification is important in forest management. The multispectral lidar Titan of Teledyne Optech Inc., with three integrated lasers scanning with different wavelengths (532, 1064 and 1500 nm) and different scan angles (7, 0 and 3.5 degrees), can improve tree species separation by providing classification features computed from the th...

The aim of this paper was to develop a generalized classification model using multispectral airborne laser scanning (ALS) data to provide species or genus level tree identification. We tested the robustness, transferability, and generalizability of the developed method across two sites in Ontario, Canada. We focused on the generalization of the app...

Species identification of individual trees using 3D and intensity features derived from ALS data requires numerous training crowns (e.g., 50/species). These training samples should be representative of within-­‐‑species variability caused by factors such as age. A single dataset of samples valid across a large region (several sites) would be desira...

O presente trabalho investiga a evolução das terras altas da alta Bacia do Rio das Velhas no Quadrilátero Ferrífero/MG – Bacia do São Francisco. A metodologia adotada se baseia na mensuração da produção do isótopo cosmogênico 10Be em escarpas e superfícies erosivas e na confecção de modelo digital do terreno. Os resultados obtidos demonstraram que...