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Zichen Zhang

16 accepted papers

2025

Reconstructing In-the-Wild Open-Vocabulary Human-Object Interactions

CVPR 2025poster

Reconstructing human-object interactions (HOI) from single images is fundamental in computer vision. Existing methods are primarily trained and tested on indoor scenes due to the lack of 3D data, particularly constrained by the object variety, making it challenging to generalize to real-world scenes…

Cited by 0SourcePDFScholar
2024

Open X-Embodiment: Robotic Learning Datasets and RT-X Models : Open X-Embodiment Collaboration

ICRA 2024

Large, high-capacity models trained on diverse datasets have shown remarkable successes on efficiently tackling downstream applications. In domains from NLP to Computer Vision, this has led to a consolidation of pretrained models, with general pretrained backbones serving as a starting point for man

Cited by 910SourcecodeScholar
2024

Open X-Embodiment: Robotic Learning Datasets and RT-X Models : Open X-Embodiment Collaboration0

ICRA 2024poster

Large, high-capacity models trained on diverse datasets have shown remarkable successes on efficiently tackling downstream applications. In domains from NLP to Computer Vision, this has led to a consolidation of pretrained models, with general pretrained backbones serving as a starting point for man…

Cited by 259SourcecodeScholar
2024

PoliFormer: Scaling On-Policy RL with Transformers Results in Masterful Navigators

CoRL 2024poster

We present PoliFormer (Policy Transformer), an RGB-only indoor navigation agent trained end-to-end with reinforcement learning at scale that generalizes to the real-world without adaptation despite being trained purely in simulation. PoliFormer uses a foundational vision transformer encoder with a c…

Cited by 16SourceScholar
2024

Unified-IO 2: Scaling Autoregressive Multimodal Models with Vision Language Audio and Action

CVPR 2024highlight

We present Unified-IO 2 a multimodal and multi-skill unified model capable of following novel instructions. Unified-IO 2 can use text images audio and/or videos as input and can generate text image or audio outputs which is accomplished in a unified way by tokenizing these different inputs and outpu…

2024

Universal Visual Decomposer: Long-Horizon Manipulation Made Easy

ICRA 2024poster

Real-world robotic tasks stretch over extended horizons and encompass multiple stages. Learning long-horizon manipulation tasks, however, is a long-standing challenge, and demands decomposing the overarching task into several manageable subtasks to facilitate policy learning and generalization to un…

Cited by 21SourceScholar
2023

Learning State Conditioned Linear Mappings for Low-Dimensional Control of Robotic Manipulators

ICRA 2023poster

Identifying an appropriate task space can simplify solving robotic manipulation problems. One solution is deploying control algorithms in a learned low-dimensional action space. Linear and nonlinear action mapping methods have trade-offs between simplicity and the ability to express motor commands o…

Cited by 3SourceScholar
2023

Managing Temporal Resolution in Continuous Value Estimation: A Fundamental Trade-off

NeurIPS 2023poster

A default assumption in reinforcement learning (RL) and optimal control is that observations arrive at discrete time points on a fixed clock cycle. Yet, many applications involve continuous-time systems where the time discretization, in principle, can be managed. The impact of time discretization on…

Cited by 4SourcePDFScholar
2023

VIMA: Robot Manipulation with Multimodal Prompts

ICML 2023poster

Prompt-based learning has emerged as a successful paradigm in natural language processing, where a single general-purpose language model can be instructed to perform any task specified by input prompts. Yet task specification in robotics comes in various forms, such as imitating one-shot demonstrati…

2022

A Simple Decentralized Cross-Entropy Method

NeurIPS 2022accept

Cross-Entropy Method (CEM) is commonly used for planning in model-based reinforcement learning (MBRL) where a centralized approach is typically utilized to update the sampling distribution based on only the top-$k$ operation's results on samples. In this paper, we show that such a centralized approa…

2021

Sample efficient learning of image-based diagnostic classifiers via probabilistic labels

AISTATS 2021poster

Deep learning approaches often require huge datasets to achieve good generalization. This complicates its use in tasks like image-based medical diagnosis, where the small training datasets are usually insufficient to learn appropriate data representations. For such sensitive tasks it is also importa…

Cited by 10SourcePDFScholar
2020

Visual Geometric Skill Inference by Watching Human Demonstration

ICRA 2020poster

We study the problem of learning manipulation skills from human demonstration video by inferring the association relationships between geometric features. Motivation for this work stems from the observation that humans perform eye-hand coordination tasks by using geometric primitives to define a tas…

Cited by 12SourceScholar
2019

BASNet: Boundary-Aware Salient Object Detection

CVPR 2019poster

Deep Convolutional Neural Networks have been adopted for salient object detection and achieved the state-of-the-art performance. Most of the previous works however focus on region accuracy but not on the boundary quality. In this paper, we propose a predict-refine architecture, BASNet, and a new hyb…

Cited by 1782PDFcodeScholar
2019

Online Object and Task Learning via Human Robot Interaction

ICRA 2019poster

This work describes the development of a robotic system that acquires knowledge incrementally through human interaction where new objects and motions are taught on the fly. The robotic system developed was one of the five finalists in the KUKA Innovation Award competition and demonstrated during the…

Cited by 32SourceScholar
2019

Robot eye-hand coordination learning by watching human demonstrations: a task function approximation approach

ICRA 2019poster

We present a robot eye-hand coordination learning method that can directly learn visual task specification by watching human demonstrations. Task specification is represented as a task function, which is learned using inverse reinforcement learning(IRL [1]) by inferring a reward model from state tra…

Cited by 19SourceScholar
2018

Real-Time Edge Template Tracking via Homography Estimation

IROS 2018poster

In this paper, we propose a novel real-time method for tracking planar edge templates. This method tracks an edge template by estimating its homography transformations with respect to the sampled edge pixels detected from the incoming frames. Particularly, we define a cost function based on a new fe…

Cited by 1SourceScholar