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Multimodal Large Language Models frequently suffer from inference hallucinations, partially stemming from language priors dominating visual evidence. Existing training-free mitigation methods either perturb the visual representation and…

Computation and Language · Computer Science 2026-04-15 Sihang Jia , Shuliang Liu , Songbo Yang , Yibo Yan , Xin Zou , Xuming Hu

How to alleviate the hallucinations of Large Language Models (LLMs) has always been the fundamental goal pursued by the LLMs research community. Looking through numerous hallucination-related studies, a mainstream category of methods is to…

Computation and Language · Computer Science 2025-02-12 Yinghui Li , Haojing Huang , Jiayi Kuang , Yangning Li , Shu-Yu Guo , Chao Qu , Xiaoyu Tan , Hai-Tao Zheng , Ying Shen , Philip S. Yu

We introduce Contrastive Region Masking (CRM), a training free diagnostic that reveals how multimodal large language models (MLLMs) depend on specific visual regions at each step of chain-of-thought (CoT) reasoning. Unlike prior approaches…

Machine Learning · Computer Science 2025-12-19 Isha Chaturvedi , Anjana Nair , Yushen Li , Adhitya Rajendra Kumar , Kevin Zhu , Sunishchal Dev , Ashwinee Panda , Vasu Sharma

Recent advancements in multimodal large language models (MLLMs) have significantly improved performance in visual question answering. However, they often suffer from hallucinations. In this work, hallucinations are categorized into two main…

Computer Vision and Pattern Recognition · Computer Science 2025-06-10 Feilong Tang , Chengzhi Liu , Zhongxing Xu , Ming Hu , Zelin Peng , Zhiwei Yang , Jionglong Su , Minquan Lin , Yifan Peng , Xuelian Cheng , Imran Razzak , Zongyuan Ge

Nowadays, the research on Large Vision-Language Models (LVLMs) has been significantly promoted thanks to the success of Large Language Models (LLM). Nevertheless, these Vision-Language Models (VLMs) are suffering from the drawback of…

Computer Vision and Pattern Recognition · Computer Science 2023-11-27 Hongyu Hu , Jiyuan Zhang , Minyi Zhao , Zhenbang Sun

Medical image segmentation is a fundamental yet challenging task due to the arduous process of acquiring large volumes of high-quality labeled data from experts. Contrastive learning offers a promising but still problematic solution to this…

Computer Vision and Pattern Recognition · Computer Science 2025-02-14 Shuang Zeng , Lei Zhu , Xinliang Zhang , Micky C Nnamdi , Wenqi Shi , J Ben Tamo , Qian Chen , Hangzhou He , Lujia Jin , Zifeng Tian , Qiushi Ren , Zhaoheng Xie , Yanye Lu

Large language models (LLMs) often suffer from hallucination, generating factually incorrect or ungrounded content, which limits their reliability in high-stakes applications. A key factor contributing to hallucination is the use of hard…

Computation and Language · Computer Science 2025-02-18 Hieu Nguyen , Zihao He , Shoumik Atul Gandre , Ujjwal Pasupulety , Sharanya Kumari Shivakumar , Kristina Lerman

The rapid development of Large Multimodal Models (LMMs) has significantly advanced multimodal understanding by harnessing the language abilities of Large Language Models (LLMs) and integrating modality-specific encoders. However, LMMs are…

Computation and Language · Computer Science 2025-02-20 Anirudh Phukan , Divyansh , Harshit Kumar Morj , Vaishnavi , Apoorv Saxena , Koustava Goswami

Multimodal hallucination in multimodal large language models (MLLMs) restricts the correctness of MLLMs. However, multimodal hallucinations are multi-sourced and arise from diverse causes. Existing benchmarks fail to adequately distinguish…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Bowen Dong , Minheng Ni , Zitong Huang , Guanglei Yang , Wangmeng Zuo , Lei Zhang

Although large vision-language models (LVLMs) have demonstrated remarkable capabilities, they are prone to hallucinations in multi-image tasks. We attribute this issue to limitations in existing attention mechanisms and insufficient…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Xiaochen Yang , Hao Fang , Jiawei Kong , Yaoxin Mao , Bin Chen , Shu-Tao Xia

Large Language Models (LLMs) have become increasingly important in natural language processing, enabling advanced data analytics through natural language queries. However, these models often generate "hallucinations"-inaccurate or…

Computation and Language · Computer Science 2024-10-29 Mikhail Rumiantsau , Aliaksei Vertsel , Ilya Hrytsuk , Isaiah Ballah

Vision-Language Models (VLMs) have advanced multi-modal tasks like image captioning, visual question answering, and reasoning. However, they often generate hallucinated outputs inconsistent with the visual context or prompt, limiting…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Shawn Li , Jiashu Qu , Yuxiao Zhou , Yuehan Qin , Tiankai Yang , Yue Zhao

Large Audio-Language Models (LALMs) can take audio and text as the inputs and answer questions about the audio. While prior LALMs have shown strong performance on standard benchmarks, there has been alarming evidence that LALMs can…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-16 Tzu-wen Hsu , Ke-Han Lu , Cheng-Han Chiang , Hung-yi Lee

Multimodal language models (MLMs) show promise for clinical decision support and diagnostic reasoning, raising the prospect of end-to-end automated medical image interpretation. However, clinicians are highly selective in adopting AI tools;…

Artificial Intelligence · Computer Science 2025-08-06 Mahtab Bigverdi , Wisdom Ikezogwo , Kevin Zhang , Hyewon Jeong , Mingyu Lu , Sungjae Cho , Linda Shapiro , Ranjay Krishna

To mitigate the hallucination problem in large language models, DoLa exploits early exit logits from the same model as a contrastive prior. However, we found that these early exit logits tend to be flat, low in magnitude, and fail to…

Computation and Language · Computer Science 2025-09-24 Byeongho Yu , Changhun Lee , Jungyu Jin , Eunhyeok Park

Radiology Report Generation (RRG) is essential for computer-aided diagnosis and medication guidance, which can relieve the heavy burden of radiologists by automatically generating the corresponding radiology reports according to the given…

Computer Vision and Pattern Recognition · Computer Science 2025-05-30 Weixing Chen , Yang Liu , Ce Wang , Jiarui Zhu , Guanbin Li , Cheng-Lin Liu , Liang Lin

This paper proposes one of the first clinical applications of multimodal large language models (LLMs) as an assistant for radiologists to check errors in their reports. We created an evaluation dataset from real-world radiology datasets…

Computation and Language · Computer Science 2024-03-05 Jinge Wu , Yunsoo Kim , Eva C. Keller , Jamie Chow , Adam P. Levine , Nikolas Pontikos , Zina Ibrahim , Paul Taylor , Michelle C. Williams , Honghan Wu

Multimodal Large Language Models (MLLMs) are increasingly deployed in real-world applications, yet their ability to make context-aware safety decisions remains limited. Existing methods often fail to balance oversensitivity (unjustified…

Computation and Language · Computer Science 2025-09-24 Zheyuan Liu , Zhangchen Xu , Guangyao Dou , Xiangchi Yuan , Zhaoxuan Tan , Radha Poovendran , Meng Jiang

Clinical Decision Support Systems (CDSS) utilize evidence-based knowledge and patient data to offer real-time recommendations, with Large Language Models (LLMs) emerging as a promising tool to generate plain-text explanations for medical…

Computation and Language · Computer Science 2023-10-04 D. Umerenkov , G. Zubkova , A. Nesterov

Large language models (LLMs) frequently produce inaccurate or fabricated information, known as "hallucinations," which compromises their reliability. Existing approaches often train an "Evil LLM" to deliberately generate hallucinations on…

Computation and Language · Computer Science 2026-01-06 Jiani Guo , Xiangke Zeng , Jie Wu , Zuchao Li