no code implementations • 8 Oct 2024 • Sangli Teng, Kaito Iwasaki, William Clark, Xihang Yu, Anthony Bloch, Ram Vasudevan, Maani Ghaffari
This work generalizes the classical metriplectic formalism to model Hamiltonian systems with nonconservative dissipation.
no code implementations • 18 Apr 2024 • Spencer Carmichael, Rahul Agrawal, Ram Vasudevan, Katherine A. Skinner
Recognizing places from an opposing viewpoint during a return trip is a common experience for human drivers.
1 code implementation • 24 Jan 2024 • Spencer Carmichael, Austin Buchan, Mani Ramanagopal, Radhika Ravi, Ram Vasudevan, Katherine A. Skinner
Conventional cameras employed in autonomous vehicle (AV) systems support many perception tasks, but are challenged by low-light or high dynamic range scenes, adverse weather, and fast motion.
1 code implementation • CVPR 2023 • Junming Zhang, Haomeng Zhang, Ram Vasudevan, Matthew Johnson-Roberson
Most real-world 3D measurements from depth sensors are incomplete, and to address this issue the point cloud completion task aims to predict the complete shapes of objects from partial observations.
no code implementations • 8 May 2023 • Elena Shrestha, Chetan Reddy, Hanxi Wan, Yulun Zhuang, Ram Vasudevan
As a result, MBRL agents may converge to sub-optimal policies if the world model is inaccurate.
1 code implementation • 18 Nov 2022 • Ming-Yuan Yu, Ram Vasudevan, Matthew Johnson-Roberson
LiDARs have been widely adopted to modern self-driving vehicles, providing 3D information of the scene and surrounding objects.
no code implementations • 2 Sep 2022 • Alexandra Carlson, Manikandasriram Srinivasan Ramanagopal, Nathan Tseng, Matthew Johnson-Roberson, Ram Vasudevan, Katherine A. Skinner
Recent advances in neural radiance fields (NeRFs) achieve state-of-the-art novel view synthesis and facilitate dense estimation of scene properties.
1 code implementation • 5 Jul 2022 • Asiegbu Miracle Kanu-Asiegbu, Ram Vasudevan, Xiaoxiao Du
We present BiPOCO, a Bi-directional trajectory predictor with POse COnstraints, for detecting anomalous activities of pedestrians in videos.
Ranked #6 on Video Anomaly Detection on HR-Avenue
1 code implementation • 5 Jul 2022 • Asiegbu Miracle Kanu-Asiegbu, Ram Vasudevan, Xiaoxiao Du
Video anomaly detection is a core problem in vision.
1 code implementation • 10 May 2021 • Yu Yao, Ella Atkins, Matthew Johnson Roberson, Ram Vasudevan, Xiaoxiao Du
In this work, we follow the neuroscience and psychological literature to define pedestrian crossing behavior as a combination of an unobserved inner will (a probabilistic representation of binary intent of crossing vs. not crossing) and a set of multi-class actions (e. g., walking, standing, etc.).
no code implementations • 2 Jan 2021 • Junming Zhang, Ming-Yuan Yu, Ram Vasudevan, Matthew Johnson-Roberson
Point cloud analysis is an area of increasing interest due to the development of 3D sensors that are able to rapidly measure the depth of scenes accurately.
1 code implementation • 29 Jul 2020 • Yu Yao, Ella Atkins, Matthew Johnson-Roberson, Ram Vasudevan, Xiaoxiao Du
BiTraP estimates the goal (end-point) of trajectories and introduces a novel bi-directional decoder to improve longer-term trajectory prediction accuracy.
Ranked #2 on Trajectory Prediction on JAAD
1 code implementation • 9 Jul 2020 • Jun-ming Zhang, Weijia Chen, Yu-Ping Wang, Ram Vasudevan, Matthew Johnson-Roberson
This paper illustrates that this proposed method achieves state-of-the-art performance on shape classification, part segmentation and point cloud completion.
1 code implementation • 8 Jun 2020 • Manikandasriram Srinivasan Ramanagopal, Zixu Zhang, Ram Vasudevan, Matthew Johnson-Roberson
To address this problem, this paper formulates reversing the effect of thermal inertia at a single pixel as a Least Absolute Shrinkage and Selection Operator (LASSO) problem which we can solve rapidly using a quadratic programming solver.
1 code implementation • 1 Jun 2020 • Cyrus Anderson, Ram Vasudevan, Matthew Johnson-Roberson
Pedestrians and drivers interact closely in a wide range of environments.
Robotics
no code implementations • 31 Mar 2020 • Matt Olfat, Stephen Sloan, Pedro Hespanhol, Matt Porter, Ram Vasudevan, Anil Aswani
Attack detection and mitigation strategies for cyberphysical systems (CPS) are an active area of research, and researchers have developed a variety of attack-detection tools such as dynamic watermarking.
1 code implementation • 3 Mar 2020 • Shreyas Kousik, Bohao Zhang, Pengcheng Zhao, Ram Vasudevan
To move through the world, mobile robots typically use a receding-horizon strategy, wherein they execute an old plan while computing a new plan to incorporate new sensor information.
Optimization and Control Robotics
2 code implementations • 5 Feb 2020 • Patrick Holmes, Shreyas Kousik, Bohao Zhang, Daphna Raz, Corina Barbalata, Matthew Johnson-Roberson, Ram Vasudevan
At runtime, in each receding-horizon planning iteration, ARMTD constructs a reachable set of the entire arm in workspace and intersects it with obstacles to generate sub-differentiable and provably-conservative collision-avoidance constraints on the trajectory parameters.
Robotics
no code implementations • 23 Sep 2019 • Alexandra Carlson, Ram Vasudevan, Matthew Johnson-Roberson
There have been impressive advances in the realm of image to image translation in transferring previously unseen visual effects into a dataset, specifically in day to night translation.
1 code implementation • 11 Sep 2019 • Cyrus Anderson, Ram Vasudevan, Matthew Johnson-Roberson
Highway driving places significant demands on human drivers and autonomous vehicles (AVs) alike due to high speeds and the complex interactions in dense traffic.
Robotics Signal Processing
1 code implementation • 5 Aug 2019 • Patrick D. Holmes, Shannon M. Danforth, Xiao-Yu Fu, Talia Y. Moore, Ram Vasudevan
To address this limitation, the recently proposed Stability Basin (SB) aims to characterize the set of perturbations that will cause an individual to fall under a specific motor control strategy.
no code implementations • 7 May 2019 • Jun-ming Zhang, Manikandasriram Srinivasan Ramanagopal, Ram Vasudevan, Matthew Johnson-Roberson
An accurate depth map of the environment is critical to the safe operation of autonomous robots and vehicles.
1 code implementation • 5 Mar 2019 • Cyrus Anderson, Xiaoxiao Du, Ram Vasudevan, Matthew Johnson-Roberson
Our work demonstrates the effectiveness and potential of using simulation as a substitution for human annotation efforts to train high-performing prediction algorithms such as the DNNs.
Robotics
1 code implementation • 18 Sep 2018 • Shreyas Kousik, Sean Vaskov, Fan Bu, Matthew Johnson-Roberson, Ram Vasudevan
At runtime, the FRS is used to map obstacles to the space of parameterized trajectories, which allows RTD to select a safe trajectory at every planning iteration.
Robotics Systems and Control
no code implementations • 17 Sep 2018 • Alexandra Carlson, Katherine A. Skinner, Ram Vasudevan, Matthew Johnson-Roberson
This domain shift is especially exaggerated between synthetic and real datasets.
no code implementations • 13 Sep 2018 • Jun-ming Zhang, Katherine A. Skinner, Ram Vasudevan, Matthew Johnson-Roberson
Initial disparity estimates are refined with an embedding learned from the semantic segmentation branch of the network.
no code implementations • 11 Sep 2018 • Xiaoxiao Du, Ram Vasudevan, Matthew Johnson-Roberson
In applications such as autonomous driving, it is important to understand, infer, and anticipate the intention and future behavior of pedestrians.
no code implementations • 10 Sep 2018 • Wonhui Kim, Manikandasriram Srinivasan Ramanagopal, Charles Barto, Ming-Yuan Yu, Karl Rosaen, Nick Goumas, Ram Vasudevan, Matthew Johnson-Roberson
This paper presents a novel dataset titled PedX, a large-scale multimodal collection of pedestrians at complex urban intersections.
1 code implementation • 21 Mar 2018 • Alexandra Carlson, Katherine A. Skinner, Ram Vasudevan, Matthew Johnson-Roberson
Recent work has focused on generating synthetic imagery to increase the size and variability of training data for learning visual tasks in urban scenes.
1 code implementation • 30 Jun 2017 • Manikandasriram Srinivasan Ramanagopal, Cyrus Anderson, Ram Vasudevan, Matthew Johnson-Roberson
We show that a state-of-the-art detector, tracker, and our classifier trained only on synthetic data can identify valid errors on KITTI tracking dataset with an average precision of 0. 94.
1 code implementation • 14 Feb 2017 • Pengcheng Zhao, Shankar Mohan, Ram Vasudevan
This paper considers the optimal control for hybrid systems whose trajectories transition between distinct subsystems when state-dependent constraints are satisfied.
Optimization and Control
2 code implementations • 6 Oct 2016 • Matthew Johnson-Roberson, Charles Barto, Rounak Mehta, Sharath Nittur Sridhar, Karl Rosaen, Ram Vasudevan
Deep learning has rapidly transformed the state of the art algorithms used to address a variety of problems in computer vision and robotics.