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Large Vision-Language Models (LVLMs) often suffer from object hallucination, making erroneous judgments about the presence of objects in images. We propose this primar- ily stems from spurious correlations arising when models strongly…

Artificial Intelligence · Computer Science 2025-11-14 Zhe Xu , Zhicai Wang , Junkang Wu , Jinda Lu , Xiang Wang

Large Vision-Language Models (LVLMs) may produce outputs that are unfaithful to reality, also known as visual hallucinations (VH), which significantly impedes their real-world usage. To alleviate VH, various decoding strategies have been…

Computer Vision and Pattern Recognition · Computer Science 2025-03-24 Xianwei Zhuang , Zhihong Zhu , Yuxin Xie , Liming Liang , Yuexian Zou

While recent Large Vision-Language Models (LVLMs) have shown remarkable performance in multi-modal tasks, they are prone to generating hallucinatory text responses that do not align with the given visual input, which restricts their…

Computer Vision and Pattern Recognition · Computer Science 2025-09-11 Ce Zhang , Zifu Wan , Zhehan Kan , Martin Q. Ma , Simon Stepputtis , Deva Ramanan , Russ Salakhutdinov , Louis-Philippe Morency , Katia Sycara , Yaqi Xie

Visual hallucinations in Large Language Models (LLMs), where the model generates responses that are inconsistent with the visual input, pose a significant challenge to their reliability, particularly in contexts where precise and…

Computer Vision and Pattern Recognition · Computer Science 2025-06-30 Nokimul Hasan Arif , Shadman Rabby , Md Hefzul Hossain Papon , Sabbir Ahmed

Object hallucination remains a primary obstacle to the reliable deployment of Multimodal Large Language Models (MLLMs). Current inference-time mitigation methods mainly assume hallucinations stem from visual neglect, steering models to…

Computation and Language · Computer Science 2026-05-28 Jingwen Wu , Xijun Zhang , Ge Song

Medical Vision-Language Models (MedVLMs) show immense promise in clinical applicability. However, their reliability is hindered by hallucinations, where models often fail to derive answers from visual evidence, instead relying on learned…

Computer Vision and Pattern Recognition · Computer Science 2025-12-22 Xiao Liang , Chenxi Liu , Zhi Ma , Di Wang , Bin Jing , Quan Wang , Yuanyuan Shi

Large vision-language models (LVLMs) are powerful, yet they remain unreliable due to object hallucinations. In this work, we show that in many hallucinatory predictions the LVLM effectively ignores the image and instead relies on previously…

Computer Vision and Pattern Recognition · Computer Science 2025-11-17 Nhat Hoang-Xuan , Minh Vu , My T. Thai , Manish Bhattarai

Large Vision-Language Models (LVLMs) have recently shown promising results on various multimodal tasks, even achieving human-comparable performance in certain cases. Nevertheless, LVLMs remain prone to hallucinations -- they often rely…

Computer Vision and Pattern Recognition · Computer Science 2025-10-17 Kyungryul Back , Seongbeom Park , Milim Kim , Mincheol Kwon , SangHyeok Lee , Hyunyoung Lee , Junhee Cho , Seunghyun Park , Jinkyu Kim

Spatial relation hallucinations pose a persistent challenge in large vision-language models (LVLMs), leading to generate incorrect predictions about object positions and spatial configurations within an image. To address this issue, we…

Computation and Language · Computer Science 2025-03-24 Jiarui Wu , Zhuo Liu , Hangfeng He

Instruction-following Vision Large Language Models (VLLMs) have achieved significant progress recently on a variety of tasks. These approaches merge strong pre-trained vision models and large language models (LLMs). Since these components…

Machine Learning · Computer Science 2024-02-20 Yiyang Zhou , Chenhang Cui , Rafael Rafailov , Chelsea Finn , Huaxiu Yao

Large Vision-Language Models (LVLMs) still struggle with vision hallucination, where generated responses are inconsistent with the visual input. Existing methods either rely on large-scale annotated data for fine-tuning, which incurs…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Yu Zhang , Chuyang Sun , Kehai Chen , Xuefeng Bai , Yang Xiang , Min Zhang

Multimodal large language models (MLLMs) have advanced the integration of visual and linguistic modalities, establishing themselves as the dominant paradigm for visual-language tasks. Current approaches like chain of thought (CoT) reasoning…

Computer Vision and Pattern Recognition · Computer Science 2024-11-20 Haojie Zheng , Tianyang Xu , Hanchi Sun , Shu Pu , Ruoxi Chen , Lichao Sun

Large Vision-Language Models (LVLMs) with discrete image tokenizers unify multimodal representations by encoding visual inputs into a finite set of tokens. Despite their effectiveness, we find that these models still hallucinate…

Computer Vision and Pattern Recognition · Computer Science 2025-05-29 Weixing Wang , Zifeng Ding , Jindong Gu , Rui Cao , Christoph Meinel , Gerard de Melo , Haojin Yang

Multimodal Large Language Models (MLLMs) often suffer from hallucinations, particularly errors in object existence, attributes, or relations, which undermine their reliability. We introduce TACO (Verified Atomic Confidence Estimation), a…

Computer Vision and Pattern Recognition · Computer Science 2025-11-13 Jiarui Liu , Weihao Xuan , Zhijing Jin , Mona Diab

While medical Multimodal Large Language Models (MLLMs) have shown promise in assisting diagnosis, they still frequently generate hallucinated responses that appear linguistically plausible but lack visual evidence. Such hallucinations pose…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Jiayi Chen , Benteng Ma , Zehui Liao , Winston Chong , Yasmeen George , Jianfei Cai

Concerns regarding the propensity of Large Language Models (LLMs) to produce inaccurate outputs, also known as hallucinations, have escalated. Detecting them is vital for ensuring the reliability of applications relying on LLM-generated…

Computation and Language · Computer Science 2024-05-31 Ernesto Quevedo , Jorge Yero , Rachel Koerner , Pablo Rivas , Tomas Cerny

Recent advances in Multimodal Large Language Models (MLLMs) have shown impressive reasoning capabilities across vision-language tasks, yet still face the challenge of compute-difficulty mismatch. Through empirical analyses, we identify that…

Machine Learning · Computer Science 2026-03-17 Huijie Guo , Jingyao Wang , Lingyu Si , Jiahuan Zhou , Changwen Zheng , Wenwen Qiang

Current research on video hallucination mitigation primarily focuses on isolated error types, leaving compositional hallucinations, arising from incorrect reasoning over multiple interacting spatial and temporal factors largely…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Wenbin Xing , Quanxing Zha , Lizheng Zu , Mengran Li , Ming Li , Junchi Yan

Hallucinations, generating responses inconsistent with the visual input, remain a critical limitation of large vision-language models (LVLMs), especially in open-ended tasks such as image captioning and visual reasoning. In this work, we…

Computer Vision and Pattern Recognition · Computer Science 2026-01-12 Mehrdad Fazli , Bowen Wei , Ziwei Zhu

Hallucinations in large language models (LLMs) pose significant safety concerns that impede their broader deployment. Recent research in hallucination detection has demonstrated that LLMs' internal representations contain truthfulness…

Machine Learning · Computer Science 2025-11-11 Mengjia Niu , Hamed Haddadi , Guansong Pang