Publications
2025
- ESWAVariational model-based Deep Reinforcement Learning for Non-Homogeneous Patrolling aquatic environments with multiple unmanned surface vehiclesSamuel Yanes Luis, Nicola Basilico, Michele Antonazzi, Daniel Gutiérrez-Reina, and Sergio Toral MarínExpert Systems with Applications, 2025
This paper addresses the challenge of Non-Homogeneous Patrolling for Autonomous Surface Vehicles in non-homogeneous importance water environments with a dissimilar biological monitorization criterion. Traditional monitoring methods fail, especially in expansive areas such as Lake Ypacaraíin Paraguay. The proposed solution employs a cooperative Deep Reinforcement Learning framework, specifically a multi-agent version of the Double Deep Q-Learning algorithm based on safe-consensus decision making. This framework optimizes adaptive policies for such vehicles by simultaneously modeling the environment and patrolling high-importance zones. The incorporation of a Variational Auto-Encoder based on the U-Network architecture directly addresses the non-observability of the environment by predicting biological importance from partial observations. The methodology is validated in a realistic algae bloom contamination scenario, demonstrating superior performance and computational efficiency compared to traditional approaches like Gaussian Processes and K-Nearest-Neighbors. The Deep Reinforcement Learning framework, coupled with the Variational Auto-Encoder model, showcases flexibility and efficiency in addressing multi-agent cooperation and long-term objective optimization for water quality monitoring. The results reveal significant improvements, with the proposed model exceeding well-founded approaches with a 30% faster minimization of the patrolling score compared to these methods.
2024
- arXivPrivacy-Preserving Robotic Perception for Object Detection in Curious Cloud RoboticsMichele Antonazzi, Matteo Alberti, Alex Bassot, Matteo Luperto, and Nicola Basilico2024(Under Review)
Cloud robotics allows low-power robots to perform computationally intensive inference tasks by offloading them to the cloud, raising privacy concerns when transmitting sensitive images. Although end-to-end encryption secures data in transit, it doesn’t prevent misuse by inquisitive third-party services since data must be decrypted for processing. This paper tackles these privacy issues in cloud-based object detection tasks for service robots. We propose a co-trained encoder-decoder architecture that retains only task-specific features while obfuscating sensitive information, utilizing a novel weak loss mechanism with proposal selection for privacy preservation. A theoretical analysis of the problem is provided, along with an evaluation of the trade-off between detection accuracy and privacy preservation through extensive experiments on public datasets and a real robot.
@article{antonazzi2024privacyweakloss, title = {Privacy-Preserving Robotic Perception for Object Detection in Curious Cloud Robotics}, author = {Antonazzi, Michele and Alberti, Matteo and Bassot, Alex and Luperto, Matteo and Basilico, Nicola}, year = {2024}, note = {(Under Review)} } - IROSR2SNet: Scalable Domain Adaptation for Object Detection in Cloud-Based Robots Ecosystems via Proposal RefinementMichele Antonazzi, Matteo Luperto, N. Alberto Borghese, and Nicola BasilicoIn 2024 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) , 2024
We introduce a novel approach for scalable domain adaptation in cloud robotics scenarios where robots rely on third-party AI inference services powered by large pre-trained deep neural networks. Our method is based on a downstream proposal-refinement stage running locally on the robots, exploiting a new lightweight DNN architecture, R2SNet. This architecture aims to mitigate performance degradation from domain shifts by adapting the object detection process to the target environment, focusing on relabeling, rescoring, and suppression of bounding-box proposals. Our method allows for local execution on robots, addressing the scalability challenges of domain adaptation without incurring significant computational costs. Real-world results on mobile service robots performing door detection show the effectiveness of the proposed method in achieving scalable domain adaptation.
@inproceedings{antonazzi2024r2snet, title = {R2SNet: Scalable Domain Adaptation for Object Detection in Cloud-Based Robots Ecosystems via Proposal Refinement}, author = {Antonazzi, Michele and Luperto, Matteo and Borghese, N. Alberto and Basilico, Nicola}, year = {2024}, organization = {IEEE}, booktitle = {2024 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)}, } - IROSFrontier-Based Exploration for Multi-Robot Rendezvous in Communication-Restricted Unknown EnvironmentsMauro Tellaroli, Matteo Luperto, Michele Antonazzi, and Nicola BasilicoIn 2024 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) , 2024
Multi-robot rendezvous and exploration are fundamental challenges in the domain of mobile robotic systems. This paper addresses multi-robot rendezvous within an initially unknown environment where communication is only possible after the rendezvous. Traditionally, exploration has been focused on rapidly mapping the environment, often leading to suboptimal rendezvous performance in later stages. We adapt a standard frontier-based exploration technique to integrate exploration and rendezvous into a unified strategy, with a mechanism that allows robots to re-visit previously explored regions thus enhancing rendezvous opportunities. We validate our approach in 3D realistic simulations using ROS, showcasing its effectiveness in achieving faster rendezvous times compared to exploration strategies.
@inproceedings{tellaroli2024frontierbased, title = {Frontier-Based Exploration for Multi-Robot Rendezvous in Communication-Restricted Unknown Environments}, author = {Tellaroli, Mauro and Luperto, Matteo and Antonazzi, Michele and Basilico, Nicola}, booktitle = {2024 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)}, year = {2024}, organization = {IEEE}, } - arXivDevelopment and Adaptation of Robotic Vision in the Real-World: the Challenge of Door DetectionMichele Antonazzi, Matteo Luperto, N. Alberto Borghese, and Nicola Basilico2024(Under Review)
Mobile service robots are increasingly prevalent in human-centric, real-world domains, operating autonomously in unconstrained indoor environments. In such a context, robotic vision plays a central role in enabling service robots to perceive high-level environmental features from visual observations. Despite the data-driven approaches based on deep learning push the boundaries of vision systems, applying these techniques to real-world robotic scenarios presents unique methodological challenges. Traditional models fail to represent the challenging perception constraints typical of service robots and must be adapted for the specific environment where robots finally operate. We propose a method leveraging photorealistic simulations that balances data quality and acquisition costs for synthesizing visual datasets from the robot perspective used to train deep architectures. Then, we show the benefits in qualifying a general detector for the target domain in which the robot is deployed, showing also the trade-off between the effort for obtaining new examples from such a setting and the performance gain. In our extensive experimental campaign, we focus on the door detection task (namely recognizing the presence and the traversability of doorways) that, in dynamic settings, is useful to infer the topology of the map. Our findings are validated in a real-world robot deployment, comparing prominent deep-learning models and demonstrating the effectiveness of our approach in practical settings.
@article{antonazzi2024development, title = {Development and Adaptation of Robotic Vision in the Real-World: the Challenge of Door Detection}, author = {Antonazzi, Michele and Luperto, Matteo and Borghese, N. Alberto and Basilico, Nicola}, year = {2024}, note = {(Under Review)} }
2023
- ECMREnhancing Door-Status Detection for Autonomous Mobile Robots during Environment-Specific Operational UseMichele Antonazzi, Matteo Luperto, Nicola Basilico, and N. Alberto BorgheseIn 2023 European Conference on Mobile Robots (ECMR) , 2023
Door-status detection, namely recognising the presence of a door and its status (open or closed), can induce a remarkable impact on a mobile robot’s navigation performance, especially for dynamic settings where doors can enable or disable passages, changing the topology of the map. In this work, we address the problem of building a door-status detector module for a mobile robot operating in the same environment for a long time, thus observing the same set of doors from different points of view. First, we show how to improve the mainstream approach based on object detection by considering the constrained perception setup typical of a mobile robot. Hence, we devise a method to build a dataset of images taken from a robot’s perspective and we exploit it to obtain a door-status detector based on deep learning. We then leverage the typical working conditions of a robot to qualify the model for boosting its performance in the working environment via fine-tuning with additional data. Our experimental analysis shows the effectiveness of this method with results obtained both in simulation and in the real-world, that also highlights a trade-off between the costs and benefits of the fine-tuning approach.
@inproceedings{antonazzi2023enhancing, title = {Enhancing Door-Status Detection for Autonomous Mobile Robots during Environment-Specific Operational Use}, author = {Antonazzi, Michele and Luperto, Matteo and Basilico, Nicola and Borghese, N. Alberto}, booktitle = {2023 European Conference on Mobile Robots (ECMR)}, year = {2023}, organization = {IEEE}, }
2020
- AURORobot exploration of indoor environments using incomplete and inaccurate prior knowledgeMatteo Luperto, Michele Antonazzi, Francesco Amigoni, and N. Alberto BorgheseRobotics and Autonomous Systems, 2020
Exploration is a task in which autonomous mobile robots incrementally discover features of interest in initially unknown environments. We consider the problem of exploration for map building, in which a robot explores an indoor environment in order to build a metric map. Most of the current exploration strategies used to select the next best locations to visit ignore prior knowledge about the environments to explore that, in some practical cases, could be available. In this paper, we present an exploration strategy that evaluates the amount of new areas that can be perceived from a location according to a priori knowledge about the structure of the indoor environment being explored, like the floor plan or the contour of external walls. Although this knowledge can be incomplete and inaccurate (e.g., a floor plan typically does not represent furniture and objects and consequently may not fully mirror the structure of the real environment), we experimentally show, both in simulation and with real robots, that employing prior knowledge improves the exploration performance in a wide range of settings.
@article{luperto2020robot, title = {Robot exploration of indoor environments using incomplete and inaccurate prior knowledge}, author = {Luperto, Matteo and Antonazzi, Michele and Amigoni, Francesco and Borghese, N. Alberto}, journal = {Robotics and Autonomous Systems}, volume = {133}, pages = {103622}, year = {2020}, publisher = {Elsevier}, doi = {10.1016/j.robot.2020.103622} }