activity
20242026
most citedVidHal: Benchmarking Temporal Hallucinations in Vision LLMs

2 citations · 3 across the 11 of their papers we have counts for

collaborators

12 papers

cs.CV2026

Make Your LVLM KV Cache More Lightweight

Xihao Chen, Yangyang Guo, Roger Zimmermann

Key-Value (KV) cache has become a de facto component of modern Large Vision-Language Models (LVLMs) for inference. While it enhances decoding efficiency in Large Language Models (L…

cs.CR2026

LLMs Can Unlearn Refusal with Only 1,000 Benign Samples

Yangyang Guo, Ziwei Xu, Si Liu +2

This study reveals a previously unexplored vulnerability in the safety alignment of Large Language Models (LLMs). Existing aligned LLMs predominantly respond to unsafe queries with…

cs.CR2025

Involuntary Jailbreak: On Self-Prompting Attacks

Yangyang Guo, Yangyan Li, Mohan Kankanhalli

In this study, we disclose a worrying new vulnerability in Large Language Models (LLMs), which we term \textbf{involuntary jailbreak}. Unlike existing jailbreak attacks, this weakn…

cs.LG2025

FZOO: Fast Zeroth-Order Optimizer for Fine-Tuning Large Language Models towards Adam-Scale Speed

Sizhe Dang, Yangyang Guo, Yanjun Zhao +4

Fine-tuning large language models (LLMs) often faces GPU memory bottlenecks: the backward pass of first-order optimizers like Adam increases memory usage to more than 10 times the…

cs.LG2025

Retrieval-Augmented Generation as Noisy In-Context Learning: A Unified Theory and Risk Bounds

Yang Guo, Yutian Tao, Yifei Ming +2

Retrieval-augmented generation (RAG) has seen many empirical successes in recent years by aiding the LLM with external knowledge. However, its theoretical aspect has remained mostl…

cs.CL2025

Sentinel: Decoding Context Utilization via Attention Probing for Efficient LLM Context Compression

Yong Zhang, Heng Li, Yanwen Huang +6

Retrieval-augmented generation (RAG) often suffers from long and noisy retrieved contexts. Existing context compression methods typically rely on heuristic relevance estimation or…

cs.CV2025

VidLBEval: Benchmarking and Mitigating Language Bias in Video-Involved LVLMs

Yiming Yang, Yangyang Guo, Hui Lu +1

Recently, Large Vision-Language Models (LVLMs) have made significant strides across diverse multimodal tasks and benchmarks. This paper reveals a largely under-explored problem fro…

cs.CR2024

Technical Report for ICML 2024 TiFA Workshop MLLM Attack Challenge: Suffix Injection and Projected Gradient Descent Can Easily Fool An MLLM

Yangyang Guo, Ziwei Xu, Xilie Xu +3

This technical report introduces our top-ranked solution that employs two approaches, \ie suffix injection and projected gradient descent (PGD) , to address the TiFA workshop MLLM…

cs.CV2024

Joint Vision-Language Social Bias Removal for CLIP

Haoyu Zhang, Yangyang Guo, Mohan Kankanhalli

Vision-Language (V-L) pre-trained models such as CLIP show prominent capabilities in various downstream tasks. Despite this promise, V-L models are notoriously limited by their inh…

cs.CV2024

SCAN: Bootstrapping Contrastive Pre-training for Data Efficiency

Yangyang Guo, Mohan Kankanhalli

While contrastive pre-training is widely employed, its data efficiency problem has remained relatively under-explored thus far. Existing methods often rely on static coreset select…

cs.CV2024★ 2 cited

VidHal: Benchmarking Temporal Hallucinations in Vision LLMs

Wey Yeh Choong, Yangyang Guo, Mohan Kankanhalli

Vision Large Language Models (VLLMs) are widely acknowledged to be prone to hallucinations. Existing research addressing this problem has primarily been confined to image inputs, w…

cs.LG2024★ 1 cited

Humor in AI: Massive Scale Crowd-Sourced Preferences and Benchmarks for Cartoon Captioning

Jifan Zhang, Lalit Jain, Yang Guo +9

We present a novel multimodal preference dataset for creative tasks, consisting of over 250 million human ratings on more than 2.2 million captions, collected through crowdsourcing…