Search Results for author: Tim Welschehold

Found 15 papers, 7 papers with code

DITTO: Demonstration Imitation by Trajectory Transformation

no code implementations22 Mar 2024 Nick Heppert, Max Argus, Tim Welschehold, Thomas Brox, Abhinav Valada

Subsequently, in the live online trajectory generation stage, we first \mbox{re-detect} all objects, then we warp the demonstration trajectory to the current scene, and finally, we trace the trajectory with the robot.

Pose Estimation

CenterGrasp: Object-Aware Implicit Representation Learning for Simultaneous Shape Reconstruction and 6-DoF Grasp Estimation

1 code implementation13 Dec 2023 Eugenio Chisari, Nick Heppert, Tim Welschehold, Wolfram Burgard, Abhinav Valada

It consists of an RGB-D image encoder that leverages recent advances to detect objects and infer their pose and latent code, and a decoder to predict shape and grasps for each object in the scene.

Object Pose Estimation +2

Robot Skill Generalization via Keypoint Integrated Soft Actor-Critic Gaussian Mixture Models

no code implementations23 Oct 2023 Iman Nematollahi, Kirill Yankov, Wolfram Burgard, Tim Welschehold

A long-standing challenge for a robotic manipulation system operating in real-world scenarios is adapting and generalizing its acquired motor skills to unseen environments.

Skill Generalization Zero-shot Generalization

Learning Hierarchical Interactive Multi-Object Search for Mobile Manipulation

no code implementations12 Jul 2023 Fabian Schmalstieg, Daniel Honerkamp, Tim Welschehold, Abhinav Valada

We present HIMOS, a hierarchical reinforcement learning approach that learns to compose exploration, navigation, and manipulation skills.

Decision Making Hierarchical Reinforcement Learning +2

The Treachery of Images: Bayesian Scene Keypoints for Deep Policy Learning in Robotic Manipulation

1 code implementation8 May 2023 Jan Ole von Hartz, Eugenio Chisari, Tim Welschehold, Wolfram Burgard, Joschka Boedecker, Abhinav Valada

We employ our method to learn challenging multi-object robot manipulation tasks from wrist camera observations and demonstrate superior utility for policy learning compared to other representation learning techniques.

Representation Learning Robot Manipulation

Improving Deep Dynamics Models for Autonomous Vehicles with Multimodal Latent Mapping of Surfaces

no code implementations21 Mar 2023 Johan Vertens, Nicolai Dorka, Tim Welschehold, Michael Thompson, Wolfram Burgard

By training everything end-to-end with the loss of the dynamics model, we enforce the latent mapper to learn an update rule for the latent map that is useful for the subsequent dynamics model.

Autonomous Vehicles

Dynamic Update-to-Data Ratio: Minimizing World Model Overfitting

1 code implementation17 Mar 2023 Nicolai Dorka, Tim Welschehold, Wolfram Burgard

Early stopping based on the validation set performance is a popular approach to find the right balance between under- and overfitting in the context of supervised learning.

Model-based Reinforcement Learning reinforcement-learning +1

N$^2$M$^2$: Learning Navigation for Arbitrary Mobile Manipulation Motions in Unseen and Dynamic Environments

1 code implementation17 Jun 2022 Daniel Honerkamp, Tim Welschehold, Abhinav Valada

Despite its importance in both industrial and service robotics, mobile manipulation remains a significant challenge as it requires a seamless integration of end-effector trajectory generation with navigation skills as well as reasoning over long-horizons.

Navigate

Doing Right by Not Doing Wrong in Human-Robot Collaboration

no code implementations5 Feb 2022 Laura Londoño, Adrian Röfer, Tim Welschehold, Abhinav Valada

As robotic systems become more and more capable of assisting humans in their everyday lives, we must consider the opportunities for these artificial agents to make their human collaborators feel unsafe or to treat them unfairly.

Decision Making Fairness +1

Robot Skill Adaptation via Soft Actor-Critic Gaussian Mixture Models

no code implementations25 Nov 2021 Iman Nematollahi, Erick Rosete-Beas, Adrian Röfer, Tim Welschehold, Abhinav Valada, Wolfram Burgard

A core challenge for an autonomous agent acting in the real world is to adapt its repertoire of skills to cope with its noisy perception and dynamics.

Courteous Behavior of Automated Vehicles at Unsignalized Intersections via Reinforcement Learning

no code implementations11 Jun 2021 Shengchao Yan, Tim Welschehold, Daniel Büscher, Wolfram Burgard

Our reinforcement learning agent learns a policy for a centralized controller to let connected autonomous vehicles at unsignalized intersections give up their right of way and yield to other vehicles to optimize traffic flow.

Autonomous Vehicles Collision Avoidance +3

3D Human Pose Estimation in RGBD Images for Robotic Task Learning

1 code implementation7 Mar 2018 Christian Zimmermann, Tim Welschehold, Christian Dornhege, Wolfram Burgard, Thomas Brox

We propose an approach to estimate 3D human pose in real world units from a single RGBD image and show that it exceeds performance of monocular 3D pose estimation approaches from color as well as pose estimation exclusively from depth.

3D Human Pose Estimation 3D Pose Estimation

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