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Workflow to spectral imagery calibration obtained in remotely piloted aircrafts (RPAs) by the empirical line method
; Moriya, Érika Akemi Saito
; ; ; Imai, Nilton Nobuhiro ; ; ; ; (Anuario do Instituto de Geociencias, 2019) [Artigo]
The usage of Remotely Piloted Aircrafts (RPAs) in environmental studies increased over the past years due to the possibility of performing low-cost aerial image acquisition. However, these studies often need to extract ... -
A Fisheye image matching method boosted by recursive search space for close range photogrammetry
Campos, Mariana Batista; Tommaselli, Antonio Maria Garcia ; Castanheiro, Letícia Ferrari ; ; (Remote Sensing, 2019) [Artigo]
Close range photogrammetry (CRP) with large field-of-view images has become widespread in recent years, especially in terrestrial mobile mapping systems (TMMS). However, feature-based matching (FBM) with omnidirectional ... -
Building detection from lidar data using entropy and the k-means concept
Dos Santos, R. C.; Pessoa, G. G. ; Carrilho, A. C. ; Galo, M. (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 2019) [Trabalho apresentado em evento]
Information obtained from LiDAR data processing is considered in a variety of applications, among them urban planning. In this context, buildings play a substantial role, since a high percentage of the urban landscape is ... -
Detecting citrus huanglongbing in brazilian orchards using hyperspectral aerial images
Moriya, E. A.S.; Imai, N. N. ; Tommaselli, A. M.G. ; Berveglieri, A. ; ; ; (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 2019) [Trabalho apresentado em evento]
Brazil is one of the world leaders in citrus plantation, and the production of orange juice is economically important in the export scenario, being regarded as a fundamental agricultural commodity in Brazil. The worst ... -
Urban scene classification using features extracted from photogrammetric point clouds acquired by uav
Pessoa, G. G.; Santos, R. C. ; Carrilho, A. C. ; Galo, M. ; Amorim, A. (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 2019) [Trabalho apresentado em evento]
Images and LiDAR point clouds are the two major data sources used by the photogrammetry and remote sensing community. Although different, the synergy between these two data sources has motivated exploration of the potential ... -
Evaluation of multiple linear regression model to obtain dbh of trees using data from a lightweight laser scanning system on-board a uav
MacHado, M. V.; Tommaselli, A. M.G. ; Tachibana, V. M. ; Martins-Neto, R. P. ; Campos, M. B. (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 2019) [Trabalho apresentado em evento]
Vegetation mapping requires information about trees and underlying vegetation to ensure proper management of the urban and forest environments. This information can be obtained using remote sensors. For instance, lightweight ... -
Comparison of pixel and region-based approaches for tree species mapping in atlantic forest using hyperspectral images acquired by uav
Miyoshi, G. T.; Imai, N. N. ; Tommaselli, A. M.G. ; (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 2019) [Trabalho apresentado em evento]
The objective of this work was the comparison of two different classification approaches to detect four different tree species of a highly diverse tropical Atlantic Forest area. In order to achieve the objective, images ... -
Tree species classification in a highly diverse subtropical forest integrating UAV-based photogrammetric point cloud and hyperspectral data
; ; ; ; ; ; Miyoshi, Gabriela Takahashi; Tommaselli, Antonio Maria Garcia (Remote Sensing, 2019) [Artigo]
The use of remote sensing data for tree species classification in tropical forests is still a challenging task, due to their high floristic and spectral diversity. In this sense, novel sensors on board of unmanned aerial ... -
Digital terrain modeling using finite element methods meshless
; ; ; ; ; Silva, João F. C. (Journal of Urban and Environmental Engineering, 2018) [Artigo]
Digital Terrain Modeling (DTM) is a computational model of the earth surface that represents relief and it has a wide range of applications. This work proposes a new approach to DTM using the Finite Element Method (FEM) ... -
A Novel Approach to Improve GNSS Precise Point Positioning during Strong Ionospheric Scintillation: Theory and Demonstration
; ; Monico, Joao Francisco Galera; ; Shimabukuro, Milton Hirokazu ; ; ; (IEEE Transactions on Vehicular Technology, 2019) [Artigo]
At equatorial latitudes, ionospheric scintillation is the major limitation in achieving high-accuracy GNSS positioning. This is because scintillation affects the tracking ability of GNSS receivers causing losses of lock ... -
Mapping the chlorophyll-a horizontal gradient in a cascading reservoirs system using MSI Sentinel-2A images
Watanabe, Fernanda; Alcântara, Enner ; Bernardo, Nariane ; de Andrade, Caroline ; Gomes, Ana Carolina ; do Carmo, Alisson ; ; Rotta, Luiz Henrique (Advances in Space Research, 2019) [Artigo]
In this work, we investigated the trophic gradient in three reservoirs cascading in Tietê River, Southeast Brazil, based on their chlorophyll-a (chl a) concentration. The goal of this study was to identify spatial patterns ... -
Performance analysis of the C2RCC processor in estimate the water quality parameters in inland waters using OLCI/Sentinel-3A images
Alcântara, Enner; De Andrade, Caroline Piffer ; Gomes, Ana Carolina ; Bernardo, Nariane ; Carmo, Alisson Fernando ; ; Watanabe, Fernanda (International Geoscience and Remote Sensing Symposium (IGARSS), 2018) [Trabalho apresentado em evento]
Remote sensing can be a powerful tool for long-term spatial and temporal water quality monitoring if proper sets of algorithms are available. To estimate optically significant substances (OSS) by satellite images the ... -
Linear Vary-Chap Topside Electron Density Model with Topside Sounder and Radio-Occultation Data
dos Santos Prol, Fabricio; ; ; de Oliveira Camargo, Paulo ; (Surveys in Geophysics, 2019) [Resenha]
The Linear Vary-Chap function has received increased attention in describing the topside ionosphere due to its good performance for predicting and extrapolating radio-occultation (RO) electron density ionospheric profiles. ... -
K d(PAR) and a depth based model to estimate the height of submerged aquatic vegetation in an oligotrophic reservoir: A case study at Nova Avanhandava
Rotta, Luiz Henrique; ; Alcântara, Enner ; Imai, Nilton ; Watanabe, Fernanda ; (Remote Sensing, 2019) [Artigo]
Submerged aquatic vegetation (SAV) carry out important biological functions in freshwater systems, however, uncontrolled growth can lead to many negative ecologic and economic impacts. Radiation availability is the primary ... -
Light absorption budget in a reservoir cascade system withwidely differing optical properties
Bernardo, Nariane; Alcântara, Enner ; Watanabe, Fernanda ; ; do Carmo, Alisson ; Gomes, Ana Carolina Campos ; Andrade, Caroline (Water (Switzerland), 2019) [Artigo]
Aquatic systems are complex systems due to the environmental pressures that lead to water quality parameter changes, and consequently, variations in optically active compounds (OAC). In cascading reservoir systems, such ... -
Reconstruction of cylindrical surfaces using digital image correlation
Berveglieri, Adilson; Tommaselli, Antonio M. G. (Sensors (Switzerland), 2018) [Artigo]
A technique for the reconstruction of cylindrical surfaces using optical images with an extension of least squares matching is presented. This technique is based on stereo-image acquisition of a cylindrical object, and it ... -
Mapping the coloured dissolved organic matter absorption coefficient in a eutrophic reservoir using remotely sensed images
Martins, Sarah; ; Alcântara, Enner ; ; (Inland Waters, 2018) [Artigo]
Dissolved organic matter (DOM) has 3 major sources: (1) autochthonous or surface water-derived of algal origin, (2) allochthonous or terrestrial material from soils, and (3) synthetic organic substances of man-made or ... -
Successional stages and their evolution in tropical forests using multi-temporal photogrammetric surface models and superpixels
Berveglieri, Adilson; Imai, Nilton N. ; Tommaselli, Antonio M.G. ; Casagrande, Baltazar ; (ISPRS Journal of Photogrammetry and Remote Sensing, 2018) [Artigo]
Airborne photogrammetric image archives offer interesting possibilities for multi-temporal analyses of environmental evolution. The objective of this investigation was to develop a technique for classifying forest successional ... -
Building boundary extraction from LiDAR data using a local estimated parameter for alpha shape algorithm
Dos Santos, R. C.; Galo, M. ; Carrilho, A. C. (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 2018) [Trabalho apresentado em evento]
The α-shape algorithm is a very common option to extract building boundaries from LiDAR data. This algorithm is normally executed in 2D space considering a parameter α as a binary classifier which controls the distinctiveness ... -
Statistical outlier detection method for airborne LiDAR data
Carrilho, A. C.; Galo, M. ; Dos Santos, R. C. (International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, 2018) [Trabalho apresentado em evento]
Sampling the Earth's surface using airborne LASER scanning (ALS) systems suffers from several factors inherent to the LASER system itself as well as external factors, such as the presence of particles in the atmosphere, ...