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Sobre

Sobre

Filipe Neves dos Santos nasceu em São Paio de Oleiros, em Portugal, em 1979. Doutorado em engenharia eletrotécnica e computadores (2014) pela Faculdade de Engenharia da Universidade do Porto (FEUP), Mestrado em engenharia eletrotécnica e computadores – automação e robótica (2007) pelo Instituto Superior Técnico (IST) da Universidade Técnica de Lisboa, licenciado em engenharia eletrotécnica e computadores (2003) pelo Instituto Superior de Engenharia do Porto (ISEP). Profissionalmente é apaixonado pela investigação e desenvolvimento de soluções robóticas e automatização que permitam resolver problemas reais, desejos e necessidades da nossa sociedade e contribuir para a autossustentabilidade e justiça da economia global. Neste momento a sua principal linha de investigação centra-se no desenvolvimento de soluções robotizadas para o setor agrícola e florestal, onde é necessária uma maior eficiência para a nossa autossustentabilidade mundial. Em 2013, considerando a realidade de Portugal e os principais roteiros de inovação, estruturou um roteiro de investigação centrado no desenvolvimento de robótica e sistemas inteligentes para o contexto agrícola e florestal. Nomeadamente, em contextos de declive acentuado e sem acesso a GPS/GNSS, onde são requeridas a execução de tarefas tais como: monitorização (por terra), pulverização de precisão, logística, poda e colheita seletiva. A execução eficiente destas tarefas depende em grande parte da robustez dos sistemas robóticos específicos, tais como:  Perceção visual;- Navegação (localização, mapeamento e planeamento de caminhos seguros); e  Manipulação e ferramentas especificas. A sua formação em engenharia MSc (fusão sensorial e GPS/GNSS), PhD (mapeamento e localização semântica), experiência de 4 anos como empreendedor (startup tecnológica), participação e coordenação de projetos de investigação na área da robótica durante mais de 12 anos, 5 anos de experiência em tarefas de contabilidade e gestão (empresa familiar), e 6 anos como técnico de eletrónica fornecerão o saber saber e saber fazer para que possa contribuir para o sucesso do futuro da robótica agrícola.

Tópicos
de interesse
Detalhes

Detalhes

  • Nome

    Filipe Neves Santos
  • Cargo

    Coordenador de TEC4
  • Desde

    20 setembro 2011
046
Publicações

2024

Fusion of Time-of-Flight Based Sensors with Monocular Cameras for a Robotic Person Follower

Autores
Sarmento, J; dos Santos, FN; Aguiar, AS; Filipe, V; Valente, A;

Publicação
JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS

Abstract
Human-robot collaboration (HRC) is becoming increasingly important in advanced production systems, such as those used in industries and agriculture. This type of collaboration can contribute to productivity increase by reducing physical strain on humans, which can lead to reduced injuries and improved morale. One crucial aspect of HRC is the ability of the robot to follow a specific human operator safely. To address this challenge, a novel methodology is proposed that employs monocular vision and ultra-wideband (UWB) transceivers to determine the relative position of a human target with respect to the robot. UWB transceivers are capable of tracking humans with UWB transceivers but exhibit a significant angular error. To reduce this error, monocular cameras with Deep Learning object detection are used to detect humans. The reduction in angular error is achieved through sensor fusion, combining the outputs of both sensors using a histogram-based filter. This filter projects and intersects the measurements from both sources onto a 2D grid. By combining UWB and monocular vision, a remarkable 66.67% reduction in angular error compared to UWB localization alone is achieved. This approach demonstrates an average processing time of 0.0183s and an average localization error of 0.14 meters when tracking a person walking at an average speed of 0.21 m/s. This novel algorithm holds promise for enabling efficient and safe human-robot collaboration, providing a valuable contribution to the field of robotics.

2024

Reagentless Vis-NIR Spectroscopy Point-of-Care for Feline Total White Blood Cell Counts

Autores
Barroso, TG; Queirós, C; Monteiro-Silva, F; Santos, F; Gregório, AH; Martins, RC;

Publicação
BIOSENSORS-BASEL

Abstract
Spectral point-of-care technology is reagentless with minimal sampling (<10 mu L) and can be performed in real-time. White blood cells are non-dominant in blood and in spectral information, suffering significant interferences from dominant constituents such as red blood cells, hemoglobin and billirubin. White blood cells of a bigger size can account for 0.5% to 22.5% of blood spectra information. Knowledge expansion was performed using data augmentation through the hybridization of 94 real-world blood samples into 300 synthetic data samples. Synthetic data samples are representative of real-world data, expanding the detailed spectral information through sample hybridization, allowing us to unscramble the spectral white blood cell information from spectra, with correlations of 0.7975 to 0.8397 and a mean absolute error of 32.25% to 34.13%; furthermore, we achieved a diagnostic efficiency between 83% and 100% inside the reference interval (5.5 to 19.5 x 10(9) cell/L), and 85.11% for cases with extreme high white blood cell counts. At the covariance mode level, white blood cells are quantified using orthogonal information on red blood cells, maximizing sensitivity and specificity towards white blood cells, and avoiding the use of non-specific natural correlations present in the dataset; thus, the specifity of white blood cells spectral information is increased. The presented research is a step towards high-specificity, reagentless, miniaturized spectral point-of-care hematology technology for Veterinary Medicine.

2024

Bi-directional hyperspectral reconstruction of cherry tomato: diagnosis of internal tissues maturation stage and composition

Autores
Tosin, R; Cunha, M; Monteiro-Silva, F; Santos, F; Barroso, T; Martins, R;

Publicação
FRONTIERS IN PLANT SCIENCE

Abstract
Introduction: Precision monitoring maturity in climacteric fruits like tomato is crucial for minimising losses within the food supply chain and enhancing pre- and post-harvest production and utilisation. Objectives: This paper introduces an approach to analyse the precision maturation of tomato using hyperspectral tomography-like. Methods: A novel bi-directional spectral reconstruction method is presented, leveraging visible to near-infrared (Vis-NIR) information gathered from tomato spectra and their internal tissues (skin, pulp, and seeds). The study, encompassing 118 tomatoes at various maturation stages, employs a multi-block hierarchical principal component analysis combined with partial least squares for bi-directional reconstruction. The approach involves predicting internal tissue spectra by decomposing the overall tomato spectral information, creating a superset with eight latent variables for each tissue. The reverse process also utilises eight latent variables for reconstructing skin, pulp, and seed spectral data. Results: The reconstruction of the tomato spectra presents a mean absolute percentage error of 30.44 % and 5.37 %, 5.25 % and 6.42 % and Pearson's correlation coefficient of 0.85, 0.98, 0.99 and 0.99 for the skin, pulp and seed, respectively. Quality parameters, including soluble solid content (%), chlorophyll (a.u.), lycopene (a.u.), and puncture force (N), were assessed and modelled with PLS with the original and reconstructed datasets, presenting a range of R2 higher than 0.84 in the reconstructed dataset. An empirical demonstration of the tomato maturation in the internal tissues revealed the dynamic of the chlorophyll and lycopene in the different tissues during the maturation process. Conclusion: The proposed approach for inner tomato tissue spectral inference is highly reliable, provides early indications and is easy to operate. This study highlights the potential of Vis-NIR devices in precision fruit maturation assessment, surpassing conventional labour-intensive techniques in cost-effectiveness and efficiency. The implications of this advancement extend to various agronomic and food chain applications, promising substantial improvements in monitoring and enhancing fruit quality. [GRAPHICS] .

2024

Plant Disease Diagnosis Based on Hyperspectral Sensing: Comparative Analysis of Parametric Spectral Vegetation Indices and Nonparametric Gaussian Process Classification Approaches

Autores
Pereira, MR; Verrelst, J; Tosin, R; Caicedo, JPR; Tavares, F; dos Santos, FN; Cunha, M;

Publicação
AGRONOMY-BASEL

Abstract
Early and accurate disease diagnosis is pivotal for effective phytosanitary management strategies in agriculture. Hyperspectral sensing has emerged as a promising tool for early disease detection, yet challenges remain in effectively harnessing its potential. This study compares parametric spectral Vegetation Indices (VIs) and a nonparametric Gaussian Process Classification based on an Automated Spectral Band Analysis Tool (GPC-BAT) for diagnosing plant bacterial diseases using hyperspectral data. The study conducted experiments on tomato plants in controlled conditions and kiwi plants in field settings to assess the performance of VIs and GPC-BAT. In the tomato experiment, the modeling processes were applied to classify the spectral data measured on the healthy class of plants (sprayed with water only) and discriminate them from the data captured on plants inoculated with the two bacterial suspensions (108 CFU mL-1). In the kiwi experiment, the standard modeling results of the spectral data collected on nonsymptomatic plants were compared to the ones obtained using symptomatic plants' spectral data. VIs, known for their simplicity in extracting biophysical information, successfully distinguished healthy and diseased tissues in both plant species. The overall accuracy achieved was 63% and 71% for tomato and kiwi, respectively. Limitations were observed, particularly in differentiating specific disease infections accurately. On the other hand, GPC-BAT, after feature reduction, showcased enhanced accuracy in identifying healthy and diseased tissues. The overall accuracy ranged from 70% to 75% in the tomato and kiwi case studies. Despite its effectiveness, the model faced challenges in accurately predicting certain disease infections, especially in the early stages. Comparative analysis revealed commonalities and differences in the spectral bands identified by both approaches, with overlaps in critical regions across plant species. Notably, these spectral regions corresponded to the absorption regions of various photosynthetic pigments and structural components affected by bacterial infections in plant leaves. The study underscores the potential of hyperspectral sensing in disease diagnosis and highlights the strengths and limitations of VIs and GPC-BAT. The identified spectral features hold biological significance, suggesting correlations between bacterial infections and alterations in plant pigments and structural components. Future research avenues could focus on refining these approaches for improved accuracy in diagnosing diverse plant-pathogen interactions, thereby aiding disease diagnosis. Specifically, efforts could be directed towards adapting these methodologies for early detection, even before symptom manifestation, to better manage agricultural diseases.

2023

Nano Aerial Vehicles for Tree Pollination

Autores
Pinheiro, I; Aguiar, A; Figueiredo, A; Pinho, T; Valente, A; Santos, F;

Publicação
APPLIED SCIENCES-BASEL

Abstract
Currently, Unmanned Aerial Vehicles (UAVs) are considered in the development of various applications in agriculture, which has led to the expansion of the agricultural UAV market. However, Nano Aerial Vehicles (NAVs) are still underutilised in agriculture. NAVs are characterised by a maximum wing length of 15 centimetres and a weight of fewer than 50 g. Due to their physical characteristics, NAVs have the advantage of being able to approach and perform tasks with more precision than conventional UAVs, making them suitable for precision agriculture. This work aims to contribute to an open-source solution known as Nano Aerial Bee (NAB) to enable further research and development on the use of NAVs in an agricultural context. The purpose of NAB is to mimic and assist bees in the context of pollination. We designed this open-source solution by taking into account the existing state-of-the-art solution and the requirements of pollination activities. This paper presents the relevant background and work carried out in this area by analysing papers on the topic of NAVs. The development of this prototype is rather complex given the interactions between the different hardware components and the need to achieve autonomous flight capable of pollination. We adequately describe and discuss these challenges in this work. Besides the open-source NAB solution, we train three different versions of YOLO (YOLOv5, YOLOv7, and YOLOR) on an original dataset (Flower Detection Dataset) containing 206 images of a group of eight flowers and a public dataset (TensorFlow Flower Dataset), which must be annotated (TensorFlow Flower Detection Dataset). The results of the models trained on the Flower Detection Dataset are shown to be satisfactory, with YOLOv7 and YOLOR achieving the best performance, with 98% precision, 99% recall, and 98% F1 score. The performance of these models is evaluated using the TensorFlow Flower Detection Dataset to test their robustness. The three YOLO models are also trained on the TensorFlow Flower Detection Dataset to better understand the results. In this case, YOLOR is shown to obtain the most promising results, with 84% precision, 80% recall, and 82% F1 score. The results obtained using the Flower Detection Dataset are used for NAB guidance for the detection of the relative position in an image, which defines the NAB execute command.

Teses
supervisionadas

2022

Arte & ciência; Como a Tecnologia CRISPR pode ser utilizada para que estas áreas, com percursos históricos diversos coalesçam num objeto que assuma na sua natureza a dimensão artística e a dimensão científica, renunciando a sua grandeza representativa.

Autor
Ana Paula Oliveira Rosas

Instituição
UP-FEUP

2022

Platform for Visualizing and Managing Multimedia Spatial-temporal Information

Autor
Gustavo Nunes Ribeiro de Magalhaes

Instituição
UP-FEUP

2022

Learn to Fly II: Acrobatic Manoeuvres

Autor
Henrique Maciel de Freitas

Instituição
UP-FEUP

2022

Development of a Virtual Tour Guide Mobile Application

Autor
Inês Rodrigues Roque de Lacerda Marques

Instituição
UP-FEUP

2022

Improving Agility in Critical Software Systems Development

Autor
Joaquim Manuel Silva Cardoso Rodrigues

Instituição
UP-FEUP