Todor Stoyanov

Todor Stoyanov

Associate Professor (on leave)

AASS Research Center
School of Science and Technology
Örebro University
70182 Örebro, Sweden
Room T1214
Phone +46 (0)19 30 33 58
todor.stoyanov@oru.se

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Brief CV

Currently I am on leave from my position at Örebro University. Contact the new lab head Johannes A. Stork for any research collaborations and projects.  If you want to get in touch with me, please contact me through my new employment at McMaster University.

I am an Associate Professor in Computer Science at Örebro University since August 2018. My primary research interests lie in autonomy for mobile robots, with a focus on perception algorithms and motion synthesis for manipulation. I hold a PhD in Computer Science from Örebro University, defended in 2012, on the topic of autonomous robot navigation.

I am also a WASP affiliated faculty. I serve as PI for one collaborative WASP project since June 2019. 

Supervision and Teaching

I am currently co-supervising the following PhD students:

  • Quanato Yang, working on continuous reinforcement learning;
  • Yuxuan Yang, working on model learning and state estimation for deformable linear objects, such as cables and hoses;
  • Marco Iannottta, industrial PhD student working on generalizable skill acquisition through reinforcement learning;
  • David Caceres Dominguez, industrial PhD student working on interactive learning and learning from demonstrations for manipulation;
  • Shih-Min Yang, working on learning for perception and manipulation;
  • Jean-Paul Ivan, working on continual learning and dataset shift with probabilistic models;
  • Finn Rietz, working on transfer for explainable reinforcement learning.

My former students at Örebro University:

  • Dinh-Cuong Hoang, defended his PhD thesis “Vision-based Perception For Autonomous Robotic Manipulation” in Decemeber 2021.
  • Daniel R. Canelhas, defended his PhD thesis “Truncated Signed Distance Fields Applied To Robotics” in April 2016. (second supervisor)

Publications

Journal Articles

[1] D. C. Dominguez, M. Iannotta, J. A. Stork, E. Schaffernicht and T. Stoyanov. A Stack-of-Tasks Approach Combined With Behavior Trees : A New Framework for Robot Control. IEEE Robotics and Automation Letters, 7(4):12110-12117, 2022BibTeX | DiVA ]
[2] F. Rietz, S. Magg, F. Heintz, T. Stoyanov, S. Wermter and J. A. Stork. Hierarchical goals contextualize local reward decomposition explanations. Neural Computing & Applications 2022BibTeX | DiVA ]
[3] Y. Yang, J. A. Stork and T. Stoyanov. Learning differentiable dynamics models for shape control of deformable linear objects. Robotics and Autonomous Systems, 158, 2022BibTeX | DiVA ]
[4] Q. Yang, J. A. Stork and T. Stoyanov. MPR-RL : Multi-Prior Regularized Reinforcement Learning for Knowledge Transfer. IEEE Robotics and Automation Letters, 7(3):7652-7659, 2022BibTeX | DiVA ]
[5] J. P. A. Ivan, T. Stoyanov and J. A. Stork. Online Distance Field Priors for Gaussian Process Implicit Surfaces. IEEE Robotics and Automation Letters, 7(4):8996-9003, 2022BibTeX | DiVA ]
[6] Y. Yang, J. A. Stork and T. Stoyanov. Particle Filters in Latent Space for Robust Deformable Linear Object Tracking. IEEE Robotics and Automation Letters, 7(4):12577-12584, 2022BibTeX | DiVA ]
[7] Q. Yang, A. Dürr, E. A. Topp, J. A. Stork and T. Stoyanov. Variable Impedance Skill Learning for Contact-Rich Manipulation. IEEE Robotics and Automation Letters, 7(3):8391-8398, 2022BibTeX | DiVA | PDF ]
[8] P. Güler, J. A. Stork and T. Stoyanov. Visual state estimation in unseen environments through domain adaptation and metric learning. Frontiers in Robotics and AI, 9, 2022BibTeX | DiVA ]
[9] D. C. Hoang, J. A. Stork and T. Stoyanov. Voting and Attention-Based Pose Relation Learning for Object Pose Estimation From 3D Point Clouds. IEEE Robotics and Automation Letters, 7(4):8980-8987, 2022BibTeX | DiVA ]
[10] D. Sun, A. Kiselev, Q. Liao, T. Stoyanov and A. Loutfi. A New Mixed Reality - based Teleoperation System for Telepresence and Maneuverability Enhancement. IEEE Transactions on Human-Machine Systems, 50(1):55-67, 2020BibTeX | DiVA | PDF ]
[11] D. C. Hoang, A. Lilienthal and T. Stoyanov. Object-RPE : Dense 3D Reconstruction and Pose Estimation with Convolutional Neural Networks. Robotics and Autonomous Systems, 133, 2020BibTeX | DiVA | PDF ]
[12] D. C. Hoang, A. Lilienthal and T. Stoyanov. Panoptic 3D Mapping and Object Pose Estimation Using Adaptively Weighted Semantic Information. IEEE Robotics and Automation Letters, 5(2):1962-1969, 2020BibTeX | DiVA ]
[13] D. Sun, Q. Liao, A. Kiselev, T. Stoyanov and A. Loutfi. Shared mixed reality-bilateral telerobotic system. Robotics and Autonomous Systems, 134, 2020BibTeX | DiVA ]
[14] D. Sun, Q. Liao, T. Stoyanov, A. Kiselev and A. Loutfi. Bilateral telerobotic system using Type-2 fuzzy neural network based moving horizon estimation force observer for enhancement of environmental force compliance and human perception. Automatica, 106:358-373, 2019BibTeX | DiVA ]
[15] C. Gabellieri, A. Palleschi, A. Mannucci, M. Pierallini, E. Stefanini, M. G. Catalano, D. Caporale, A. Settimi, T. Stoyanov, M. Magnusson, M. Garabini and L. Pallottino. Towards an Autonomous Unwrapping System for Intralogistics. IEEE Robotics and Automation Letters, 4(4):4603-4610, 2019BibTeX | DiVA | PDF ]
[16] B. Della Corte, H. Andreasson, T. Stoyanov and G. Grisetti. Unified Motion-Based Calibration of Mobile Multi-Sensor Platforms With Time Delay Estimation. IEEE Robotics and Automation Letters, 4(2):902-909, 2019BibTeX | DiVA ]
[17] D. R. Canelhas, E. Schaffernicht, T. Stoyanov, A. Lilienthal and A. J. Davison. Compressed Voxel-Based Mapping Using Unsupervised Learning. Robotics, 6(3), 2017BibTeX | DiVA ]
[18] J. Ahtiainen, T. Stoyanov and J. Saarinen. Normal Distributions Transform Traversability Maps : LIDAR-Only Approach for Traversability Mapping in Outdoor Environments. Journal of Field Robotics, 34(3):600-621, 2017BibTeX | DiVA ]
[19] D. R. Canelhas, T. Stoyanov and A. J. Lilienthal. From Feature Detection in Truncated Signed Distance Fields to Sparse Stable Scene Graphs. IEEE Robotics and Automation Letters, 1(2):1148-1155, 2016BibTeX | DiVA | PDF ]
[20] T. Stoyanov, N. Vaskevicius, C. A. Mueller, T. Fromm, R. Krug, V. Tincani, R. Mojtahedzadeh, S. Kunaschk, R. M. Ernits, D. R. Canelhas, M. Bonilla, S. Schwertfeger, M. Bonini, H. Halfar, K. Pathak, M. Rohde, G. Fantoni, A. Bicchi, A. Birk, A. J. Lilienthal and W. Echelmeyer. No More Heavy Lifting : Robotic Solutions to the Container-Unloading Problem. IEEE robotics & automation magazine, 23(4):94-106, 2016BibTeX | DiVA ]
[21] R. Krug, T. Stoyanov, V. Tincani, H. Andreasson, R. Mosberger, G. Fantoni and A. J. Lilienthal. The Next Step in Robot Commissioning : Autonomous Picking and Palletizing. IEEE Robotics and Automation Letters, 1(1):546-553, 2016BibTeX | DiVA | PDF ]
[22] H. Andreasson, A. Bouguerra, M. Cirillo, D. N. Dimitrov, D. Driankov, L. Karlsson, A. J. Lilienthal, F. Pecora, J. P. Saarinen, A. Sherikov and T. Stoyanov. Autonomous transport vehicles : where we are and what is missing. IEEE robotics & automation magazine, 22(1):64-75, 2015BibTeX | DiVA ]
[23] H. Andreasson, J. Saarinen, M. Cirillo, T. Stoyanov and A. Lilienthal. Drive the Drive : From Discrete Motion Plans to Smooth Drivable Trajectories. Robotics, 3(4):400-416, 2014BibTeX | DiVA | PDF ]
[24] J. Saarinen, H. Andreasson, T. Stoyanov and A. J. Lilienthal. 3D normal distributions transform occupancy maps : an efficient representation for mapping in dynamic environments. The international journal of robotics research, 32(14):1627-1644, 2013BibTeX | DiVA ]
[25] T. Stoyanov, R. Mojtahedzadeh, H. Andreasson and A. J. Lilienthal. Comparative evaluation of range sensor accuracy for indoor mobile robotics and automated logistics applications. Robotics and Autonomous Systems, 61(10):1094-1105, 2013BibTeX | DiVA ]
[26] T. Stoyanov, M. Magnusson and A. J. Lilienthal. Comparative evaluation of the consistency of three-dimensional spatial representations used in autonomous robot navigation. Journal of Field Robotics, 30(2):216-236, 2013BibTeX | DiVA ]
[27] T. Stoyanov, M. Magnusson, A. J. Lilienthal and H. Andreasson. Fast and accurate scan registration through minimization of the distance between compact 3D NDT Representations. The international journal of robotics research, 31(12):1377-1393, 2012BibTeX | DiVA ]

Book Chapters

[1] M. Pfingsthorn, Y. Nevatia, T. Stoyanov, R. Rathnam, S. Markov and A. Birk. Towards Cooperative and Decentralized Mapping in the Jacobs Virtual Rescue Team. In RoboCup 2008 : Robot Soccer World Cup XII Vol 5399, 5399:225-234, 2009BibTeX | DiVA ]

Refereed Conference and Workshop Articles

[1] D. C. Hoang, J. A. Stork and T. Stoyanov. Context-Aware Grasp Generation in Cluttered Scenes. In IEEE International Conference on Robotics and Automation (ICRA 2022), Philadelphia, USA, May 23-27, 2022 2022BibTeX | DiVA | PDF ]
[2] F. Rietz, E. Schaffernicht, T. Stoyanov and J. A. Stork. Towards Task-Prioritized Policy Composition. 2022BibTeX | DiVA ]
[3] Q. Yang, J. A. Stork and T. Stoyanov. Transferring Knowledge for Reinforcement Learning in Contact-Rich Manipulation. 2022BibTeX | DiVA ]
[4] Q. Yang, A. Dürr, E. A. Topp, J. A. Stork and T. Stoyanov. Learning Impedance Actions for Safe Reinforcement Learning in Contact-Rich Tasks. In NeurIPS 2021 Workshop on Deployable Decision Making in Embodied Systems (DDM) 2021BibTeX | DiVA | PDF ]
[5] Y. Yang, J. A. Stork and T. Stoyanov. Learning to Propagate Interaction Effects for Modeling Deformable Linear Objects Dynamics. In 2021 IEEE International Conference on Robotics and Automation (ICRA) : IEEE International Conference on Robotics and Automation (ICRA 2021), Xi'an, China, May 30 - June 5, 2021, pages 1950-1957, 2021BibTeX | DiVA | PDF ]
[6] Q. Yang, J. A. Stork and T. Stoyanov. Null space based efficient reinforcement learning with hierarchical safety constraints. In 2021 European Conference on Mobile Robots (ECMR) 2021BibTeX | DiVA | PDF ]
[7] J. A. Stork and T. Stoyanov. Ensemble of Sparse Gaussian Process Experts for Implicit Surface Mapping with Streaming Data. In IEEE International Conference on Robotics and Automation, pages 10758-10764, 2020BibTeX | DiVA ]
[8] D. C. Hoang, T. Stoyanov and A. J. Lilienthal. Object-RPE : Dense 3D Reconstruction and Pose Estimation with Convolutional Neural Networks for Warehouse Robots. In 2019 European Conference on Mobile Robots, ECMR 2019 : Proceedings 2019BibTeX | DiVA | PDF ]
[9] D. R. Canelhas, T. Stoyanov and A. J. Lilienthal. A Survey of Voxel Interpolation Methods and an Evaluation of Their Impact on Volumetric Map-Based Visual Odometry. In Proceedings of the IEEE International Conference on Robotics and Automation (ICRA),, pages 6337-6343, 2018BibTeX | DiVA | PDF ]
[10] T. Stoyanov, R. Krug, A. Kiselev, D. Sun and A. Loutfi. Assisted Telemanipulation : A Stack-Of-Tasks Approach to Remote Manipulator Control. In 2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 6640-6645, 2018BibTeX | DiVA ]
[11] J. Lundell, R. Krug, E. Schaffernicht, T. Stoyanov and V. Kyrki. Safe-To-Explore State Spaces : Ensuring Safe Exploration in Policy Search with Hierarchical Task Optimization. In IEEE-RAS Conference on Humanoid Robots, pages 132-138, 2018BibTeX | DiVA ]
[12] H. Andreasson, D. Adolfsson, T. Stoyanov, M. Magnusson and A. Lilienthal. Incorporating Ego-motion Uncertainty Estimates in Range Data Registration. In 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 1389-1395, 2017BibTeX | DiVA ]
[13] T. Stoyanov, R. Krug, R. Muthusamy and V. Kyrki. Grasp Envelopes : Extracting Constraints on Gripper Postures from Online Reconstructed 3D Models. In Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 885-892, 2016BibTeX | DiVA | PDF ]
[14] M. Magnusson, N. Vaskevicius, T. Stoyanov, K. Pathak and A. Birk. Beyond points : Evaluating recent 3D scan-matching algorithms. In 2015 IEEE International Conference on Robotics and Automation (ICRA), 2015 June(2015-June):3631-3637, 2015BibTeX | DiVA | PDF ]
[15] H. Andreasson, J. Saarinen, M. Cirillo, T. Stoyanov and A. Lilienthal. Fast, continuous state path smoothing to improve navigation accuracy. In IEEE International Conference on Robotics and Automation (ICRA), 2015, pages 662-669, 2015BibTeX | DiVA ]
[16] R. Krug, T. Stoyanov and A. Lilienthal. Grasp Envelopes for Constraint-based Robot Motion Planning and Control. In Robotics: Science and Systems Conference : Workshop on Bridging the Gap between Data-driven and Analytical Physics-based Grasping and Manipulation 2015BibTeX | DiVA | PDF ]
[17] R. Krug, T. Stoyanov, V. Tincani, H. Andreasson, R. Mosberger, G. Fantoni, A. Bicchi and A. Lilienthal. On Using Optimization-based Control instead of Path-Planning for Robot Grasp Motion Generation. In IEEE International Conference on Robotics and Automation (ICRA) - Workshop on Robotic Hands, Grasping, and Manipulation 2015BibTeX | DiVA | PDF ]
[18] V. Tincani, M. Catalano, G. Grioli, T. Stoyanov, R. Krug, A. J. Lilienthal, G. Fantoni and A. Bicchi. Sensitive Active Surfaces on the Velvet II Dexterous Gripper. , pages 2744-2750, 2015BibTeX | DiVA ]
[19] V. Tincani, T. Stoyanov, R. Krug, M. Catalano, G. Grioli, A. J. Lilienthal, G. Fantoni and A. Bicchi. The Grasp Acquisition Strategy of the Velvet II. 2015BibTeX | DiVA ]
[20] R. Krug, T. Stoyanov, M. Bonilla, V. Tincani, N. Vaskevicius, G. Fantoni, A. Birk, A. Lilienthal and A. Bicchi. Improving Grasp Robustness via In-Hand Manipulation with Active Surfaces. In Workshop on Autonomous Grasping and Manipulation : An Open Challenge 2014BibTeX | DiVA | PDF ]
[21] N. Vaskevicius, C. A. Mueller, M. Bonilla, V. Tincani, T. Stoyanov, G. Fantoni, K. Pathak, A. J. Lilienthal, A. Bicchi and A. Birk. Object recognition and localization for robust grasping with a dexterous gripper in the context of container unloading. , pages 1270-1277, 2014BibTeX | DiVA ]
[22] V. H. Bennetts, E. Schaffernicht, T. Stoyanov, A. J. Lilienthal and M. Trincavelli. Robot Assisted Gas Tomography - Localizing Methane Leaks in Outdoor Environments. In 2014 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION (ICRA), pages 6362-6367, 2014BibTeX | DiVA ]
[23] V. Hernandez Bennetts, E. Schaffernicht, T. Stoyanov, A. J. Lilienthal and M. Trincavelli. Robot assisted gas tomography : an alternative approach for the detection of fugitive methane emissions. In Workshop on Robot Monitoring 2014BibTeX | DiVA ]
[24] R. Krug, T. Stoyanov, M. Bonilla, V. Tincani, N. Vaskevicius, G. Fantoni, A. Birk, A. J. Lilienthal and A. Bicchi. Velvet fingers : grasp planning and execution for an underactuated gripper with active surfaces. In Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), pages 3669-3675, 2014BibTeX | DiVA ]
[25] R. Mojtahedzadeh, T. Stoyanov and A. J. Lilienthal. Application Based 3D Sensor Evaluation : A Case Study in 3D Object Pose Estimation for Automated Unloading of Containers. In Proceedings of the European Conference on Mobile Robots (ECMR), pages 313-318, 2013BibTeX | DiVA ]
[26] J. Saarinen, T. Stoyanov, H. Andreasson and A. J. Lilienthal. Fast 3D mapping in highly dynamic environments using normal distributions transform occupancy maps. In Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 4694-4701, 2013BibTeX | DiVA ]
[27] D. R. Canelhas, T. Stoyanov and A. J. Lilienthal. Improved local shape feature stability through dense model tracking. In Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 3203-3209, 2013BibTeX | DiVA ]
[28] H. Almqvist, M. Magnusson, T. Stoyanov and A. J. Lilienthal. Improving Point-Cloud Accuracy from a Moving Platform in Field Operations. In 2013 IEEE International Conference on Robotics and Automation (ICRA), pages 733-738, 2013BibTeX | DiVA ]
[29] J. Saarinen, H. Andreasson, T. Stoyanov and A. J. Lilienthal. Normal distributions transform monte-carlo localization (NDT-MCL). In Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 382-389, 2013BibTeX | DiVA ]
[30] T. Stoyanov, J. Saarinen, H. Andreasson and A. J. Lilienthal. Normal distributions transform occupancy map fusion : simultaneous mapping and tracking in large scale dynamic environments. In Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 4702-4708, 2013BibTeX | DiVA ]
[31] J. Saarinen, H. Andreasson, T. Stoyanov, J. Ala-Luhtala and A. J. Lilienthal. Normal distributions transform occupancy maps : application to large-scale online 3D mapping. In IEEE International Conference on Robotics and Automation, pages 2233-2238, 2013BibTeX | DiVA ]
[32] D. R. Canelhas, T. Stoyanov and A. J. Lilienthal. SDF tracker : a parallel algorithm for on-line pose estimation and scene reconstruction from depth images. In Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), pages 3671-3676, 2013BibTeX | DiVA ]
[33] K. Charusta, R. Krug, T. Stoyanov, D. Dimitrov and B. Iliev. Generation of independent contact regions on objects reconstructed from noisy real-world range data. In 2012 IEEE International Conference on Robotics and Automation (ICRA), pages 1338-1344, 2012BibTeX | DiVA ]
[34] T. Stoyanov, M. Magnusson and A. J. Lilienthal. Point Set Registration through Minimization of the L-2 Distance between 3D-NDT Models. In 2012 IEEE International Conference on Robotics and Automation (ICRA), pages 5196-5201, 2012BibTeX | DiVA ]
[35] H. Andreasson and T. Stoyanov. Real time registration of RGB-D data using local visual features and 3D-NDT registration. In Proc. of International Conference on Robotics and Automation (ICRA) Workshop on Semantic Perception, Mapping and Exploration (SPME) 2012BibTeX | DiVA ]
[36] T. Stoyanov, A. Louloudi, H. Andreasson and A. J. Lilienthal. Comparative evaluation of range sensor accuracy in indoor environments. In Proceedings of the 5th European Conference on Mobile Robots, ECMR 2011, pages 19-24, 2011BibTeX | DiVA | PDF ]
[37] T. Stoyanov, M. Magnusson, H. Almqvist and A. J. Lilienthal. On the Accuracy of the 3D Normal Distributions Transform as a Tool for Spatial Representation. In 2011 IEEE International Conference on Robotics and Automation (ICRA) 2011BibTeX | DiVA ]
[38] G. Ferri, A. Mondini, A. Manzi, B. Mazzolai, C. Laschi, V. Mattoli, M. Reggente, T. Stoyanov, A. J. Lilienthal, M. Lettere and P. Dario. DustCart, a Mobile Robot for Urban Environments : Experiments of Pollution Monitoring and Mapping during Autonomous Navigation in Urban Scenarios. In Proceedings of ICRA Workshop on Networked and Mobile Robot Olfaction in Natural, Dynamic Environments 2010BibTeX | DiVA ]
[39] T. Stoyanov, M. Magnusson, H. Andreasson and A. J. Lilienthal. Path planning in 3D environments using the normal distributions transform. In IEEE/RSJ 2010 International Conference on Intelligent Robots and Systems (IROS 2010), pages 3263-3268, 2010BibTeX | DiVA | PDF ]
[40] T. Stoyanov and A. J. Lilienthal. Maximum Likelihood Point Cloud Acquisition from a Rotating Laser Scanner on a Moving Platform. In Proceedings of the IEEE International Conference on Advanced Robotics (ICAR) 2009BibTeX | DiVA ]
[41] T. Stoyanov and A. J. Lilienthal. Maximum likelihood point cloud acquisition from a mobile platform. In International conference on advanced robotics, ICAR 2009., pages 1-6, 2009BibTeX | DiVA | PDF ]
[42] A. Birk, J. Poppinga, T. Stoyanov and Y. Nevatia. Planetary Exploration in USARSim : A Case Study including Real World Data from Mars. In RoboCup 2008 : Robot Soccer World Cup XII, pages 463-472, 2009BibTeX | DiVA ]
[43] Y. Nevatia, T. Stoyanov, R. Rathnam, M. Pfingsthorn, S. Markov, R. Ambrus and A. Birk. Augmented Autonomy : Improving human-robot team performance in Urban Search and Rescue. In 2008 IEEE/RSJ International Conference on Robots and Intelligent Systems, vols 1-3, conference proceedings, pages 2103-2108, 2008BibTeX | DiVA ]
[44] A. Birk, T. Stoyanov, Y. Nevatia, R. Ambrus, J. Poppinga and K. Pathak. Terrain Classification for Autonomous Robot Mobility : from Safety, Security Rescue Robotics to Planetary Exploration. 2008BibTeX | DiVA ]
[45] S. Carpin, T. Stoyanov, Y. Nevatia, M. Lewis and J. Wang. Quantitative Assessments of USARSim Accuracy. 2006BibTeX | DiVA ]

Theses

[1] T. D. Stoyanov. Reliable autonomus navigation in semi-structured environments using the three-dimensional normal distributions transform (3D-NDT). Örebro University, School of Science and Technology, Ph.D. Thesis, 2012BibTeX | DiVA ]