Search Results for author: Zackory Erickson

Found 24 papers, 9 papers with code

EMGBench: Benchmarking Out-of-Distribution Generalization and Adaptation for Electromyography

1 code implementation31 Oct 2024 Jehan Yang, Maxwell Soh, Vivianna Lieu, Douglas J Weber, Zackory Erickson

This paper introduces the first generalization and adaptation benchmark using machine learning for evaluating out-of-distribution performance of electromyography (EMG) classification algorithms.

Benchmarking Electromyography (EMG) +1

Towards an LLM-Based Speech Interface for Robot-Assisted Feeding

no code implementations27 Oct 2024 Jessie Yuan, Janavi Gupta, Akhil Padmanabha, Zulekha Karachiwalla, Carmel Majidi, Henny Admoni, Zackory Erickson

Speech interfaces, especially ones that utilize Large Language Models (LLMs), can enable individuals to effectively and naturally communicate high-level commands and nuanced preferences to robots.

VoicePilot: Harnessing LLMs as Speech Interfaces for Physically Assistive Robots

no code implementations5 Apr 2024 Akhil Padmanabha, Jessie Yuan, Janavi Gupta, Zulekha Karachiwalla, Carmel Majidi, Henny Admoni, Zackory Erickson

Physically assistive robots present an opportunity to significantly increase the well-being and independence of individuals with motor impairments or other forms of disability who are unable to complete activities of daily living.

Code Generation

BodyMAP -- Jointly Predicting Body Mesh and 3D Applied Pressure Map for People in Bed

1 code implementation4 Apr 2024 Abhishek Tandon, Anujraaj Goyal, Henry M. Clever, Zackory Erickson

In contrast, we introduce BodyMAP, which jointly predicts the human body mesh and 3D applied pressure map across the entire human body.

DiffTORI: Differentiable Trajectory Optimization for Deep Reinforcement and Imitation Learning

no code implementations8 Feb 2024 Weikang Wan, Ziyu Wang, YuFei Wang, Zackory Erickson, David Held

The key to our approach is to leverage the recent progress in differentiable trajectory optimization, which enables computing the gradients of the loss with respect to the parameters of trajectory optimization.

Imitation Learning

RL-VLM-F: Reinforcement Learning from Vision Language Foundation Model Feedback

no code implementations6 Feb 2024 YuFei Wang, Zhanyi Sun, Jesse Zhang, Zhou Xian, Erdem Biyik, David Held, Zackory Erickson

Reward engineering has long been a challenge in Reinforcement Learning (RL) research, as it often requires extensive human effort and iterative processes of trial-and-error to design effective reward functions.

reinforcement-learning Reinforcement Learning (RL)

BodyMAP - Jointly Predicting Body Mesh and 3D Applied Pressure Map for People in Bed

no code implementations CVPR 2024 Abhishek Tandon, Anujraaj Goyal, Henry M. Clever, Zackory Erickson

In contrast we introduce BodyMAP which jointly predicts the human body mesh and 3D applied pressure map across the entire human body.

Quantifying Assistive Robustness Via the Natural-Adversarial Frontier

no code implementations16 Oct 2023 Jerry Zhi-Yang He, Zackory Erickson, Daniel S. Brown, Anca D. Dragan

We propose that capturing robustness in these interactive settings requires constructing and analyzing the entire natural-adversarial frontier: the Pareto-frontier of human policies that are the best trade-offs between naturalness and low robot performance.

A Multimodal Sensing Ring for Quantification of Scratch Intensity

1 code implementation8 Feb 2023 Akhil Padmanabha, Sonal Choudhary, Carmel Majidi, Zackory Erickson

In this work, we present a framework for the estimation of scratch intensity in addition to the detection of scratch.

Learning Representations that Enable Generalization in Assistive Tasks

no code implementations5 Dec 2022 Jerry Zhi-Yang He, aditi raghunathan, Daniel S. Brown, Zackory Erickson, Anca D. Dragan

We advocate that generalization to such OOD policies benefits from (1) learning a good latent representation for human policies that test-time humans can accurately be mapped to, and (2) making that representation adaptable with test-time interaction data, instead of relying on it to perfectly capture the space of human policies based on the simulated population only.

EDO-Net: Learning Elastic Properties of Deformable Objects from Graph Dynamics

no code implementations19 Sep 2022 Alberta Longhini, Marco Moletta, Alfredo Reichlin, Michael C. Welle, David Held, Zackory Erickson, Danica Kragic

We study the problem of learning graph dynamics of deformable objects that generalizes to unknown physical properties.

Visual Haptic Reasoning: Estimating Contact Forces by Observing Deformable Object Interactions

no code implementations11 Aug 2022 YuFei Wang, David Held, Zackory Erickson

Robotic manipulation of highly deformable cloth presents a promising opportunity to assist people with several daily tasks, such as washing dishes; folding laundry; or dressing, bathing, and hygiene assistance for individuals with severe motor impairments.

Causal Confusion and Reward Misidentification in Preference-Based Reward Learning

no code implementations13 Apr 2022 Jeremy Tien, Jerry Zhi-Yang He, Zackory Erickson, Anca D. Dragan, Daniel S. Brown

While much prior work focuses on causal confusion in reinforcement learning and behavioral cloning, we focus on a systematic study of causal confusion and reward misidentification when learning from preferences.

Imitation Learning

Assistive VR Gym: Interactions with Real People to Improve Virtual Assistive Robots

1 code implementation9 Jul 2020 Zackory Erickson, Yijun Gu, Charles C. Kemp

Through a formal study with eight participants in AVR Gym, we found that the Original policies performed poorly, the Revised policies performed significantly better, and that improvements to the biomechanical models used to train the Revised policies resulted in simulated people that better match real participants.

Multimodal Material Classification for Robots using Spectroscopy and High Resolution Texture Imaging

1 code implementation2 Apr 2020 Zackory Erickson, Eliot Xing, Bharat Srirangam, Sonia Chernova, Charles C. Kemp

Finally, we present how a robot can combine this high resolution local sensing with images from the robot's head-mounted camera to achieve accurate material classification over a scene of objects on a table.

General Classification Material Classification +1

Bodies at Rest: 3D Human Pose and Shape Estimation from a Pressure Image using Synthetic Data

1 code implementation CVPR 2020 Henry M. Clever, Zackory Erickson, Ariel Kapusta, Greg Turk, C. Karen Liu, Charles C. Kemp

We describe a physics-based method that simulates human bodies at rest in a bed with a pressure sensing mat, and present PressurePose, a synthetic dataset with 206K pressure images with 3D human poses and shapes.

3D human pose and shape estimation 3D Human Shape Estimation +1

Assistive Gym: A Physics Simulation Framework for Assistive Robotics

4 code implementations10 Oct 2019 Zackory Erickson, Vamsee Gangaram, Ariel Kapusta, C. Karen Liu, Charles C. Kemp

Assistive Gym models a person's physical capabilities and preferences for assistance, which are used to provide a reward function.

Reinforcement Learning

Learning to Collaborate from Simulation for Robot-Assisted Dressing

no code implementations14 Sep 2019 Alexander Clegg, Zackory Erickson, Patrick Grady, Greg Turk, Charles C. Kemp, C. Karen Liu

We investigated the application of haptic feedback control and deep reinforcement learning (DRL) to robot-assisted dressing.

Deep Reinforcement Learning

Classification of Household Materials via Spectroscopy

2 code implementations10 May 2018 Zackory Erickson, Nathan Luskey, Sonia Chernova, Charles C. Kemp

To explore this, we collected a dataset of spectral measurements from two commercially available spectrometers during which a robotic platform interacted with 50 flat material objects, and we show that a neural network model can accurately analyze these measurements.

Classification General Classification +3

3D Human Pose Estimation on a Configurable Bed from a Pressure Image

no code implementations21 Apr 2018 Henry M. Clever, Ariel Kapusta, Daehyung Park, Zackory Erickson, Yash Chitalia, Charles C. Kemp

In this work, we present two convolutional neural networks to estimate the 3D joint positions of a person in a configurable bed from a single pressure image.

3D Human Pose Estimation

Deep Haptic Model Predictive Control for Robot-Assisted Dressing

no code implementations27 Sep 2017 Zackory Erickson, Henry M. Clever, Greg Turk, C. Karen Liu, Charles C. Kemp

The physical implications of dressing are complicated by non-rigid garments, which can result in a robot indirectly applying high forces to a person's body.

Common Sense Reasoning Model Predictive Control

Semi-Supervised Haptic Material Recognition for Robots using Generative Adversarial Networks

1 code implementation10 Jul 2017 Zackory Erickson, Sonia Chernova, Charles C. Kemp

Our approach achieves state-of-the-art results and enables a robot to estimate the material class of household objects with ~90% accuracy when 92% of the training data are unlabeled.

Material Recognition Time Series +1

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