Search Results for author: Ram Vasudevan

Found 31 papers, 20 papers with code

Dataset and Benchmark: Novel Sensors for Autonomous Vehicle Perception

1 code implementation24 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.

Benchmarking

Hyperspherical Embedding for Point Cloud Completion

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.

Decoder Multi-Task Learning +1

LiSnowNet: Real-time Snow Removal for LiDAR Point Cloud

1 code implementation18 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.

Snow Removal

Coupling Intent and Action for Pedestrian Crossing Behavior Prediction

1 code implementation10 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.).

Action Detection Autonomous Vehicles +2

Learning Rotation-Invariant Representations of Point Clouds Using Aligned Edge Convolutional Neural Networks

no code implementations2 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.

Data Augmentation Point Cloud Classification

BiTraP: Bi-directional Pedestrian Trajectory Prediction with Multi-modal Goal Estimation

1 code implementation29 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.

Autonomous Driving Collision Avoidance +5

Point Set Voting for Partial Point Cloud Analysis

1 code implementation9 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.

Point Cloud Classification Point Cloud Completion

Pixel-Wise Motion Deblurring of Thermal Videos

1 code implementation8 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.

Deblurring

Covariance-Robust Dynamic Watermarking

no code implementations31 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.

Autonomous Vehicles Fairness +1

Safe, Optimal, Real-time Trajectory Planning with a Parallel Constrained Bernstein Algorithm

1 code implementation3 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

Reachable Sets for Safe, Real-Time Manipulator Trajectory Design

1 code implementation5 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

Shadow Transfer: Single Image Relighting For Urban Road Scenes

no code implementations23 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.

Image Relighting Image-to-Image Translation +1

On-Demand Trajectory Predictions for Interaction Aware Highway Driving

1 code implementation11 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

Characterizing the limits of human stability during motion: perturbative experiment validates a model-based approach for the Sit-to-Stand task

1 code implementation5 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.

STS

Stochastic Sampling Simulation for Pedestrian Trajectory Prediction

1 code implementation5 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

Bridging the Gap Between Safety and Real-Time Performance in Receding-Horizon Trajectory Design for Mobile Robots

1 code implementation18 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

Bio-LSTM: A Biomechanically Inspired Recurrent Neural Network for 3D Pedestrian Pose and Gait Prediction

no code implementations11 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.

Autonomous Driving

Modeling Camera Effects to Improve Visual Learning from Synthetic Data

1 code implementation21 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.

object-detection Object Detection

Failing to Learn: Autonomously Identifying Perception Failures for Self-driving Cars

1 code implementation30 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.

Autonomous Driving Navigate +4

Optimal Control for Nonlinear Hybrid Systems via Convex Relaxations

1 code implementation14 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

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