no code implementations • 22 Jun 2022 • Tianyu Wang, Nikhil Karnwal, Nikolay Atanasov
We use an action encoder-decoder model to obtain a low-dimensional latent action space and train a LAtent Policy using Adversarial imitation Learning (LAPAL).
no code implementations • 23 Apr 2022 • Qiaojun Feng, Nikolay Atanasov
A local mesh is reconstructed using an initialization and refinement stage.
1 code implementation • 18 Feb 2022 • Baoqian Wang, Junfei Xie, Nikolay Atanasov
In this paper, we address this limitation by introducing a scalable MARL method called Distributed multi-Agent Reinforcement Learning with One-hop Neighbors (DARL1N).
no code implementations • 21 Sep 2021 • Thai Duong, Nikolay Atanasov
Adaptive control is a critical component of reliable robot autonomy in rapidly changing operational conditions.
no code implementations • ICCV 2021 • Mo Shan, Qiaojun Feng, You-Yi Jau, Nikolay Atanasov
It is compact because it relies on a low-dimensional latent representation of implicit object shape, allowing onboard storage of large multi-category object maps.
no code implementations • 23 Jul 2021 • Ehsan Zobeidi, Nikolay Atanasov
Unlike an SDF, which measures distance to the nearest surface in any direction, an SDDF measures distance in a given direction.
no code implementations • 24 Jun 2021 • Thai Duong, Nikolay Atanasov
This paper proposes a Hamiltonian formulation over the SE(3) manifold of the structure of a neural ordinary differential equation (ODE) network to approximate the dynamics of a rigid body.
no code implementations • 11 Mar 2021 • Tianyu Zhao, Qiaojun Feng, Sai Jadhav, Nikolay Atanasov
This paper considers online object-level mapping using partial point-cloud observations obtained online in an unknown environment.
no code implementations • 10 Mar 2021 • Tianyu Wang, Nikolay Atanasov
We employ a spectral learning approach to extract a weighted finite automaton (WFA), approximating the unknown logic structure of the task.
no code implementations • 8 Mar 2021 • Qiaojun Feng, Yue Meng, Mo Shan, Nikolay Atanasov
We show that the errors between projections of the mesh model and the observed keypoints and masks can be differentiated in order to obtain accurate instance-specific object shapes.
no code implementations • 8 Mar 2021 • Qiaojun Feng, Nikolay Atanasov
This paper focuses on pose registration of different object instances from the same category.
no code implementations • 7 Jan 2021 • Baoqian Wang, Junfei Xie, Nikolay Atanasov
This paper aims to mitigate straggler effects in synchronous distributed learning for multi-agent reinforcement learning (MARL) problems.
1 code implementation • 6 Jan 2021 • Qiaojun Feng, Nikolay Atanasov
Each local mesh is initialized from sparse depth measurements.
no code implementations • 1 Jan 2021 • Tianyu Wang, Vikas Dhiman, Nikolay Atanasov
The objective is to infer a cost function that explains demonstrated behavior while relying only on the expert's observations and state-control trajectory.
1 code implementation • 29 Dec 2020 • Vikas Dhiman, Mohammad Javad Khojasteh, Massimo Franceschetti, Nikolay Atanasov
This paper focuses on learning a model of system dynamics online while satisfying safety constraints.
no code implementations • 3 Nov 2020 • Kehan Long, Cheng Qian, Jorge Cortés, Nikolay Atanasov
Control barrier functions are widely used to enforce safety properties in robot motion planning and control.
Motion Planning
Robotics
1 code implementation • 15 Sep 2020 • Thai Duong, Michael Yip, Nikolay Atanasov
This paper focuses on online occupancy mapping and real-time collision checking onboard an autonomous robot navigating in a large unknown environment.
Robotics
2 code implementations • 29 Jul 2020 • Mo Shan, Vikas Dhiman, Qiaojun Feng, Jinzhao Li, Nikolay Atanasov
Introducing object-level semantic information into simultaneous localization and mapping (SLAM) system is critical.
no code implementations • 9 Jun 2020 • Tianyu Wang, Vikas Dhiman, Nikolay Atanasov
The objective is to infer a cost function that explains demonstrated behavior while relying only on the expert's observations and state-control trajectory.
no code implementations • L4DC 2020 • Tianyu Wang, Vikas Dhiman, Nikolay Atanasov
The objective is to infer a cost function that explains demonstrated behavior while relying only on the expert’s observations and state-control trajectory.
no code implementations • 14 May 2020 • Zhichao Li, Thai Duong, Nikolay Atanasov
This paper considers the problem of safe autonomous navigation in unknown environments, relying on local obstacle sensing.
Systems and Control Robotics Systems and Control
no code implementations • 26 Feb 2020 • Tianyu Wang, Vikas Dhiman, Nikolay Atanasov
This paper focuses on inverse reinforcement learning (IRL) to enable safe and efficient autonomous navigation in unknown partially observable environments.
1 code implementation • 5 Feb 2020 • Thai Duong, Nikhil Das, Michael Yip, Nikolay Atanasov
This paper focuses on real-time occupancy mapping and collision checking onboard an autonomous robot navigating in an unknown environment.
1 code implementation • L4DC 2020 • Mohammad Javad Khojasteh, Vikas Dhiman, Massimo Franceschetti, Nikolay Atanasov
This paper focuses on learning a model of system dynamics online while satisfying safety constraints. Our motivation is to avoid offline system identification or hand-specified dynamics models and allowa system to safely and autonomously estimate and adapt its own model during online operation. Given streaming observations of the system state, we use Bayesian learning to obtain a distributionover the system dynamics.
no code implementations • 23 Oct 2019 • Steven W. Chen, Tianyu Wang, Nikolay Atanasov, Vijay Kumar, Manfred Morari
The approach combines an offline-trained fully-connected neural network with an online primal active set solver.
2 code implementations • 7 Oct 2018 • Sikang Liu, Kartik Mohta, Nikolay Atanasov, Vijay Kumar
Search-based motion planning has been used for mobile robots in many applications.
Robotics
no code implementations • 23 Jan 2018 • Ke Sun, Kelsey Saulnier, Nikolay Atanasov, George J. Pappas, Vijay Kumar
Many accurate and efficient methods exist that address this problem but most assume that the occupancy states of different elements in the map representation are statistically independent.
Robotics
no code implementations • 6 Dec 2017 • Kartik Mohta, Michael Watterson, Yash Mulgaonkar, Sikang Liu, Chao Qu, Anurag Makineni, Kelsey Saulnier, Ke Sun, Alex Zhu, Jeffrey Delmerico, Konstantinos Karydis, Nikolay Atanasov, Giuseppe Loianno, Davide Scaramuzza, Kostas Daniilidis, Camillo Jose Taylor, Vijay Kumar
One of the most challenging tasks for a flying robot is to autonomously navigate between target locations quickly and reliably while avoiding obstacles in its path, and with little to no a-priori knowledge of the operating environment.
Robotics
no code implementations • ICLR 2018 • Arbaaz Khan, Clark Zhang, Nikolay Atanasov, Konstantinos Karydis, Vijay Kumar, Daniel D. Lee
The third part uses a network controller that learns to store those specific instances of past information that are necessary for planning.
no code implementations • 7 Jul 2017 • Mo Shan, Nikolay Atanasov
The superiority of the proposed spatiotemporal model is demonstrated on the Moving MNIST dataset augmented with rotation and scaling.
no code implementations • CVPR 2017 • Alex Zihao Zhu, Nikolay Atanasov, Kostas Daniilidis
An Extended Kalman Filter with a structureless measurement model then fuses the feature tracks with the output of the IMU.
no code implementations • 23 May 2017 • Steven W. Chen, Nikolay Atanasov, Arbaaz Khan, Konstantinos Karydis, Daniel D. Lee, Vijay Kumar
This work is a first thorough study of memory structures for deep-neural-network-based robot navigation, and offers novel tools to train such networks from supervision and quantify their ability to generalize to unseen scenarios.
no code implementations • 1 Apr 2014 • Menglong Zhu, Nikolay Atanasov, George J. Pappas, Kostas Daniilidis
This paper presents an active approach for part-based object detection, which optimizes the order of part filter evaluations and the time at which to stop and make a prediction.
no code implementations • 20 Sep 2013 • Nikolay Atanasov, Bharath Sankaran, Jerome Le Ny, George J. Pappas, Kostas Daniilidis
One of the central problems in computer vision is the detection of semantically important objects and the estimation of their pose.