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Yuancheng Xu

14 accepted papers

2026

PropensityBench: Evaluating Latent Safety Risks in Large Language Models via an Agentic Approach

ICLR 2026poster

Recent advances in Large Language Models (LLMs) have sparked concerns over their potential to acquire and misuse dangerous capabilities, posing frontier risks to society. Current safety evaluations primarily test for what a model *can* do---its capabilities---without assessing what it *would* do if…

Cited by 0SourcecodeScholar
2026

Vista4D: Video Reshooting with 4D Point Clouds

CVPR 2026

We present **Vista4D**, a robust and flexible video reshooting framework that grounds the input video and target cameras in a 4D point cloud. Specifically, given an input video, our method re-synthesizes the scene with the same dynamics from a different camera trajectory and viewpoint. Existing vide

Cited by 0SourcecodeScholar
2025

Can Watermarking Large Language Models Prevent Copyrighted Text Generation and Hide Training Data?

AAAI 2025technical

Large Language Models (LLMs) have demonstrated impressive capabilities in generating diverse and contextually rich text. However, concerns regarding copyright infringement arise as LLMs may inadvertently produce copyrighted material. In this paper, we first investigate the effectiveness of watermark…

Cited by 4SourcePDFScholar
2025

GenARM: Reward Guided Generation with Autoregressive Reward Model for Test-Time Alignment

ICLR 2025poster

Large Language Models (LLMs) exhibit impressive capabilities but require careful alignment with human preferences. Traditional training-time methods finetune LLMs using human preference datasets but incur significant training costs and require repeated training to handle diverse user preferences. Te…

2025

Go-with-the-Flow: Motion-Controllable Video Diffusion Models Using Real-Time Warped Noise

CVPR 2025poster

Generative modeling aims to transform random noise into structured outputs. In this work, we enhance video diffusion models by allowing motion control via structured latent noise sampling. This is achieved by just a change in data: we pre-process training videos to yield structured noise. Consequent…

2025

PARM: Multi-Objective Test-Time Alignment via Preference-Aware Autoregressive Reward Model

ICML 2025poster

Multi-objective test-time alignment aims to adapt large language models (LLMs) to diverse multi-dimensional user preferences during inference while keeping LLMs frozen. Recently, GenARM (Xu et al., 2025) first independently trains Autoregressive Reward Models (ARMs) for each preference dimension wi…

2025

Scaling Inference-Time Search with Vision Value Model for Improved Visual Comprehension

ICCV 2025poster

Despite significant advancements in vision-language models (VLMs), there lacks effective approaches to enhance response quality by scaling inference-time computation. This capability is known to be a core step towards the self-improving models in recent large language model studies. In this paper, w…

2024

Adapting Static Fairness to Sequential Decision-Making: Bias Mitigation Strategies towards Equal Long-term Benefit Rate

ICML 2024poster

Decisions made by machine learning models can have lasting impacts, making long-term fairness a critical consideration. It has been observed that ignoring the long-term effect and directly applying fairness criterion in static settings can actually worsen bias over time. To address biases in sequent…

2024

Mementos: A Comprehensive Benchmark for Multimodal Large Language Model Reasoning over Image Sequences

ACL 2024long

Multimodal Large Language Models (MLLMs) have demonstrated proficiency in handling a variety of visual-language tasks. However, current MLLM benchmarks are predominantly designed to evaluate reasoning based on static information about a single image, and the ability of modern MLLMs to extrapolate fr…

2024

SAFLEX: Self-Adaptive Augmentation via Feature Label Extrapolation

ICLR 2024poster

Data augmentation, a cornerstone technique in deep learning, is crucial in enhancing model performance, especially with scarce labeled data. While traditional techniques are effective, their reliance on hand-crafted methods limits their applicability across diverse data types and tasks. Although mod…

Cited by 1SourcePDFScholar
2024

Shadowcast: Stealthy Data Poisoning Attacks Against Vision-Language Models

NeurIPS 2024poster

Vision-Language Models (VLMs) excel in generating textual responses from visual inputs, but their versatility raises security concerns. This study takes the first step in exposing VLMs’ susceptibility to data poisoning attacks that can manipulate responses to innocuous, everyday prompts. We introduc…

2024

WAVES: Benchmarking the Robustness of Image Watermarks

ICML 2024poster

In the burgeoning age of generative AI, watermarks act as identifiers of provenance and artificial content. We present WAVES (Watermark Analysis via Enhanced Stress-testing), a benchmark for assessing image watermark robustness, overcoming the limitations of current evaluation methods. WAVES integra…

2023

C-Disentanglement: Discovering Causally-Independent Generative Factors under an Inductive Bias of Confounder

NeurIPS 2023poster

Representation learning assumes that real-world data is generated by a few semantically meaningful generative factors (i.e., sources of variation) and aims to discover them in the latent space. These factors are expected to be causally disentangled, meaning that distinct factors are encoded into sep…

2023

Exploring and Exploiting Decision Boundary Dynamics for Adversarial Robustness

ICLR 2023poster

The robustness of a deep classifier can be characterized by its margins: the decision boundary's distances to natural data points. However, it is unclear whether existing robust training methods effectively increase the margin for each vulnerable point during training. To understand this, we propose…