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12. Comparative Analysis of TLS and UAV Sensors for Estimation of Grapevine Geometric Parameters.

Author

Ferreira, Leilson, Sousa, Joaquim J., Lourenço, José. M., Peres, Emanuel, Morais, Raul, and Pádua, Luís

Subjects
OPTICAL scanners, POINT cloud, DRONE aircraft, GRAPES, APPROPRIATE technology
Abstract

Understanding geometric and biophysical characteristics is essential for determining grapevine vigor and improving input management and automation in viticulture. This study compares point cloud data obtained from a Terrestrial Laser Scanner (TLS) and various UAV sensors including multispectral, panchromatic, Thermal Infrared (TIR), RGB, and LiDAR data, to estimate geometric parameters of grapevines. Descriptive statistics, linear correlations, significance using the F-test of overall significance, and box plots were used for analysis. The results indicate that 3D point clouds from these sensors can accurately estimate maximum grapevine height, projected area, and volume, though with varying degrees of accuracy. The TLS data showed the highest correlation with grapevine height (r = 0.95, p < 0.001; R2 = 0.90; RMSE = 0.027 m), while point cloud data from panchromatic, RGB, and multispectral sensors also performed well, closely matching TLS and measured values (r > 0.83, p < 0.001; R2 > 0.70; RMSE < 0.084 m). In contrast, TIR point cloud data performed poorly in estimating grapevine height (r = 0.76, p < 0.001; R2 = 0.58; RMSE = 0.147 m) and projected area (r = 0.82, p < 0.001; R2 = 0.66; RMSE = 0.165 m). The greater variability observed in projected area and volume from UAV sensors is related to the low point density associated with spatial resolution. These findings are valuable for both researchers and winegrowers, as they support the optimization of TLS and UAV sensors for precision viticulture, providing a basis for further research and helping farmers select appropriate technologies for crop monitoring. [ABSTRACT FROM AUTHOR]

Published
2024
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13. ARPocketLab—A Mobile Augmented Reality System for Pedagogic Applications.

Author

Nunes, Miguel, Adão, Telmo, Shahrabadi, Somayeh, Capela, António, Carneiro, Diana, Branco, Pedro, Magalhães, Luís, Morais, Raul, and Peres, Emanuel

Subjects
AUGMENTED reality, COGNITIVE ability, DISTANCE education, EDUCATIONAL outcomes, EDUCATORS
Abstract

The widespread adoption of digital technologies in educational systems has been globally reflecting a shift in pedagogic content delivery that seems to fit modern generations of students while tackling relevant challenges faced by the current scholar context, e.g., progress traceability, pedagogic content fair access and intuitive visual representativeness, mobility issue mitigation, and sustainability in crisis situations. Among these technologies, augmented reality (AR) emerges as a particularly promising approach, allowing the visualization of computer-generated interactive data on top of real-world elements, thus enhancing comprehension and intuition regarding educational content, often in mobile settings. While the application of AR to education has been widely addressed, issues related to performance interaction and cognitive performance are commonly addressed, with lesser attention paid to the limitations associated with setup complexity, mostly related to experiences configurating tools, or contextual range, i.e., technical/scientific domain targeting versatility. Therefore, this paper introduces ARPocketLab, a digital, mobile, flexible, and scalable solution designed for the dynamic needs of modern tutorship. With a dual-interface system, it allows both educators and students to interactively design and engage with AR content directly tied to educational outcomes. Moreover, ARPocketLab's design, aimed at handheld operationalization using a minimal set of physical resources, is particularly relevant in environments where educational materials are scarce or in situations where remote learning becomes necessary. Its versatility stems from the fact that it only requires a marker or a surface (e.g., a table) to function at full capacity. To evaluate the solution, tests were conducted with 8th-grade Portuguese students within the context of Physics and Chemistry subject. Results demonstrate the application's effectiveness in providing didactic assistance, with positive feedback not only in terms of usability but also regarding learning performance. The participants also reported openness for the adoption of AR in pedagogic contexts. [ABSTRACT FROM AUTHOR]

Published
2024
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14. Grapevine Varieties Classification Using Machine Learning

Author

Marques, Pedro, Pádua, Luís, Adão, Telmo, Hruška, Jonáš, Sousa, José, Peres, Emanuel, Sousa, Joaquim J., Morais, Raul, Sousa, António, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Moura Oliveira, Paulo, editor, Novais, Paulo, editor, and Reis, Luís Paulo, editor

Published
2019
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15. Digital Ampelographer: A CNN Based Preliminary Approach

Author

Adão, Telmo, Pinho, Tatiana M., Ferreira, António, Sousa, António, Pádua, Luís, Sousa, José, Sousa, Joaquim J., Peres, Emanuel, Morais, Raul, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Moura Oliveira, Paulo, editor, Novais, Paulo, editor, and Reis, Luís Paulo, editor

Published
2019
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16. Classification of an Agrosilvopastoral System Using RGB Imagery from an Unmanned Aerial Vehicle

Author

Pádua, Luís, Guimarães, Nathalie, Adão, Telmo, Marques, Pedro, Peres, Emanuel, Sousa, António, Sousa, Joaquim J., Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Moura Oliveira, Paulo, editor, Novais, Paulo, editor, and Reis, Luís Paulo, editor

Published
2019
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18. Using Problem-Based Learning to Help Portuguese Students Make the Bologna Transition

Author

Reis, Manuel Cabral, Peres, Emanuel, Morais, Raul, and Escola, Joaquim

Abstract

The Bologna Declaration has opened a stage of big and deep changes in the internal university organization, external cooperation, teaching models and methods, among other., all over the European countries. Here we will present and discuss a pilot experience conducted at the Engineering Department of the University of Trás-os-Montes e Alto Douro, Portugal, during the second year of that transition period. In brief, we will present a set of non-mandatory courses proposed to the students of each individual syllabus, with one hundred hours duration, each, approximately seven hours/week, fifteen weeks long, with the permanent help of a specialized trainer to aid the students in their "homework". The formal bureaucratic transition is also presented. Design and implementation issues, supported on problem-based learning and experimental lab learning classes, final assessment results, as well as the opinion of the students, are presented and analyzed. We believe that this methodology helped to make the transition smoother to the students, but also to the teaching staff.

Published
2013

20. Procedural Modelling Methodology Evaluation

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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21. Conclusions

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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22. Generation of Virtual Buildings Composed by Arbitrary Shapes

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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23. Generation of Virtual Buildings Constrained by Convex Shapes

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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24. Generation of Virtual Buildings Formed by Rectangles

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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25. Procedural Modelling Methodology Overview

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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26. Introduction

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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27. Ontologies and Procedural Modelling

Author

Adão, Telmo, Magalhães, Luís, Peres, Emanuel, Zdonik, Stan, Series editor, Shekhar, Shashi, Series editor, Katz, Jonathan, Series editor, Wu, Xindong, Series editor, Jain, Lakhmi C., Series editor, Padua, David, Series editor, Shen, Xuemin Sherman, Series editor, Furht, Borko, Series editor, Subrahmanian, V.S., Series editor, Hebert, Martial, Series editor, Ikeuchi, Katsushi, Series editor, Siciliano, Bruno, Series editor, Jajodia, Sushil, Series editor, Lee, Newton, Series editor, Adão, Telmo, Magalhães, Luís, and Peres, Emanuel

Published
2016
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29. Empowering Deaf-Hearing Communication: Exploring Synergies between Predictive and Generative AI-Based Strategies towards (Portuguese) Sign Language Interpretation

Author

Adão, Telmo, primary, Oliveira, João, additional, Shahrabadi, Somayeh, additional, Jesus, Hugo, additional, Fernandes, Marco, additional, Costa, Ângelo, additional, Ferreira, Vânia, additional, Gonçalves, Martinho, additional, Lopéz, Miguel, additional, Peres, Emanuel, additional, and Magalhães, Luís, additional

Published
2023
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33. Digital Ampelographer: A CNN Based Preliminary Approach

Author

Adão, Telmo, primary, Pinho, Tatiana M., additional, Ferreira, António, additional, Sousa, António, additional, Pádua, Luís, additional, Sousa, José, additional, Sousa, Joaquim J., additional, Peres, Emanuel, additional, and Morais, Raul, additional

Published
2019
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38. E-Commerce

Author

Meira, Daniela, primary, Magalhães, Luís, additional, Pereira, Francisco, additional, and Peres, Emanuel, additional

Published
2018
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40. Preface

Author

Cruz-Cunha, Maria Manuela, primary, Martinho, Ricardo, additional, Rijo, Rui, additional, Domingos, Dulce, additional, and Peres, Emanuel, additional

Published
2023
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43. Framework for Collaborative 3D Urban Environments

Author

Melo, Miguel, Bessa, Maximino, Rocha, Tânia, Sousa, José, Peres, Emanuel, Varajão, João, Magalhães, Luís, Cruz-Cunha, Maria Manuela, editor, Varajão, João, editor, Powell, Philip, editor, and Martinho, Ricardo, editor

Published
2011
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46. UAV-Based Hyperspectral Monitoring Using Push-Broom and Snapshot Sensors: A Multisite Assessment for Precision Viticulture Applications

Author

Sousa, Joaquim J., primary, Toscano, Piero, additional, Matese, Alessandro, additional, Di Gennaro, Salvatore Filippo, additional, Berton, Andrea, additional, Gatti, Matteo, additional, Poni, Stefano, additional, Pádua, Luís, additional, Hruška, Jonáš, additional, Morais, Raul, additional, and Peres, Emanuel, additional

Published
2022
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