2 documents found, page 1 of 1
Sunspot Detection Using YOLOv5 in Spectroheliograph H-Alpha Images
Santos, José; Peixinho, Nuno; Barata, Teresa; Pereira, Carlos; Coimbra, A. Paulo; Crisóstomo, Manuel M.; Mendes, MateusSolar activity has been subject to increasingly more research in the last decades. Its influence on life on Earth is now better understood. Solar winds impact the earth’s magnetic field and atmosphere. They can disrupt satellite communication and navigation tools and even electrical power grids and several other infrastructure crucial for our technology-based society. Coronal mass ejections (CMEs), solar energe...
Non-Destructive Fast Estimation of Tree Stem Height and Volume Using Image Proc...
Coelho, João; Fidalgo, Beatriz; Crisóstomo, Manuel M.; Salas-González, Raúl; Coimbra, A. Paulo; Mendes, MateusMeasuring biometric tree characteristics to estimate the volume of wood in a forest area is a time consuming task. It is usually performed by a team of two or more people, who measure the diameter and height of several trees in sampling plots. The results are then extrapolated for the forest stand. The present paper describes a method which facilitates estimating tree biometric parameters using computational te...