← Search

Chenxin Xu

12 accepted papers

2024

Editable Scene Simulation for Autonomous Driving via Collaborative LLM-Agents

CVPR 2024highlight

Scene simulation in autonomous driving has gained significant attention because of its huge potential for generating customized data. However existing editable scene simulation approaches face limitations in terms of user interaction efficiency multi-camera photo-realistic rendering and external dig…

2024

Language-Driven Interactive Traffic Trajectory Generation

NeurIPS 2024poster

Realistic trajectory generation with natural language control is pivotal for advancing autonomous vehicle technology. However, previous methods focus on individual traffic participant trajectory generation, thus failing to account for the complexity of interactive traffic dynamics. In this work, we…

2024

RA2FD: Distilling Faithfulness into Efficient Dialogue Systems

EMNLP 2024main

Generating faithful and fast responses is crucial in the knowledge-grounded dialogue. Retrieval Augmented Generation (RAG) strategies are effective but are inference inefficient, while previous Retrieval Free Generations (RFG) are more efficient but sacrifice faithfulness. To solve this faithfulness…

2024

Self-Supervised Bird’s Eye View Motion Prediction with Cross-Modality Signals

AAAI 2024technical

Learning the dense bird's eye view (BEV) motion flow in a self-supervised manner is an emerging research for robotics and autonomous driving. Current self-supervised methods mainly rely on point correspondences between point clouds, which may introduce the problems of fake flow and inconsistency, hi…

2023

Auxiliary Tasks Benefit 3D Skeleton-based Human Motion Prediction

ICCV 2023poster

Exploring spatial-temporal dependencies from observed motions is one of the core challenges of human motion prediction. Previous methods mainly focus on dedicated network structures to model the spatial and temporal dependencies. This paper considers a new direction by introducing a model learning f…

Cited by 41PDFcodeScholar
2023

EqMotion: Equivariant Multi-Agent Motion Prediction With Invariant Interaction Reasoning

CVPR 2023poster

Learning to predict agent motions with relationship reasoning is important for many applications. In motion prediction tasks, maintaining motion equivariance under Euclidean geometric transformations and invariance of agent interaction is a critical and fundamental principle. However, such equivaria…

2023

FedDisco: Federated Learning with Discrepancy-Aware Collaboration

ICML 2023poster

This work considers the category distribution heterogeneity in federated learning. This issue is due to biased labeling preferences at multiple clients and is a typical setting of data heterogeneity. To alleviate this issue, most previous works consider either regularizing local models or fine-tunin…

2023

Joint-Relation Transformer for Multi-Person Motion Prediction

ICCV 2023poster

Multi-person motion prediction is a challenging problem due to the dependency of motion on both individual past movements and interactions with other people. Transformer-based methods have shown promising resultson this task, but they miss the explicit relation representation between joints, such as…

Cited by 13PDFcodeScholar
2023

Leapfrog Diffusion Model for Stochastic Trajectory Prediction

CVPR 2023poster

To model the indeterminacy of human behaviors, stochastic trajectory prediction requires a sophisticated multi-modal distribution of future trajectories. Emerging diffusion models have revealed their tremendous representation capacities in numerous generation tasks, showing potential for stochastic…

2022

GroupNet: Multiscale Hypergraph Neural Networks for Trajectory Prediction With Relational Reasoning

CVPR 2022poster

Demystifying the interactions among multiple agents from their past trajectories is fundamental to precise and interpretable trajectory prediction. However, previous works only consider pair-wise interactions with limited relational reasoning. To promote more comprehensive interaction modeling for r…

Cited by 171PDFcodeScholar
2022

Remember Intentions: Retrospective-Memory-Based Trajectory Prediction

CVPR 2022poster

To realize trajectory prediction, most previous methods adopt the parameter-based approach, which encodes all the seen past-future instance pairs into model parameters. However, in this way, the model parameters come from all seen instances, which means a huge amount of irrelevant seen instances mig…

Cited by 151PDFcodeScholar
2021

Invariant Teacher and Equivariant Student for Unsupervised 3D Human Pose Estimation

AAAI 2021technical

We propose a novel method based on teacher-student learning framework for 3D human pose estimation without any 3D annotation or side information. To solve this unsupervised-learning problem, the teacher network adopts pose-dictionary-based modeling for regularization to estimate a physically plausib…