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Large Vision-Language Models have shown strong multimodal reasoning capabilities, yet they remain susceptible to object hallucinations when language priors dominate insufficient or misaligned visual evidence. Training-free contrastive…

Computer Vision and Pattern Recognition · Computer Science 2026-05-25 Xiaoyi Huang , Kejia Zhang , Zhiming Luo

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

Large vision-language models (LVLMs) achieve strong performance on visual reasoning tasks but remain highly susceptible to hallucination. Existing detection methods predominantly rely on coarse, whole-image measures of how an object token…

Large Vision-Language Models (LVLMs) have achieved impressive performance in multimodal tasks, but they still suffer from hallucinations, i.e., generating content that is grammatically accurate but inconsistent with visual inputs. In this…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Chenxi Li , Yichen Guo , Benfang Qian , Jinhao You , Kai Tang , Yaosong Du , Zonghao Zhang , Xiande Huang

We study object hallucination in Multimodal Large Language Models (MLLMs) and improve visual contrastive decoding (VCD) by constructing an object-aligned auxiliary view. We leverage object-centric attention in self-supervised Vision…

Computer Vision and Pattern Recognition · Computer Science 2026-02-13 Boqi Chen , Xudong Liu , Jianing Qiu

Large Vision-Language Models (LVLMs) often produce responses that misalign with factual information, a phenomenon known as hallucinations. While hallucinations are well-studied, the exact causes behind them remain underexplored. In this…

Computer Vision and Pattern Recognition · Computer Science 2025-03-07 Sreyan Ghosh , Chandra Kiran Reddy Evuru , Sonal Kumar , Utkarsh Tyagi , Oriol Nieto , Zeyu Jin , Dinesh Manocha

Generative Vision-Language Models (VLMs) are prone to generate plausible-sounding textual answers that, however, are not always grounded in the input image. We investigate this phenomenon, usually referred to as "hallucination" and show…

Computer Vision and Pattern Recognition · Computer Science 2024-03-22 Alessandro Favero , Luca Zancato , Matthew Trager , Siddharth Choudhary , Pramuditha Perera , Alessandro Achille , Ashwin Swaminathan , Stefano Soatto

Out-of-distribution (OOD) detection is essential for reliable and trustworthy machine learning. Recent multi-modal OOD detection leverages textual information from in-distribution (ID) class names for visual OOD detection, yet it currently…

Computation and Language · Computer Science 2023-10-13 Yi Dai , Hao Lang , Kaisheng Zeng , Fei Huang , Yongbin Li

Multimodal Large Language Models (MLLMs) have made significant progress in bridging the gap between visual and language modalities. However, hallucinations in MLLMs, where the generated text does not align with image content, continue to be…

Artificial Intelligence · Computer Science 2024-08-05 Kohou Wang , Xiang Liu , Zhaoxiang Liu , Kai Wang , Shiguo Lian

Large vision-language models (LVLMs) exhibit impressive ability to jointly reason over visual and textual inputs. However, they often produce outputs that are linguistically fluent but factually inconsistent with the visual evidence, i.e.,…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Zihu Wang , Boxun Xu , Yuxuan Xia , Peng Li

Although vision models such as Contrastive Language-Image Pre-Training (CLIP) show impressive generalization performance, their zero-shot robustness is still limited under Out-of-Distribution (OOD) scenarios without fine-tuning. Instead of…

Computer Vision and Pattern Recognition · Computer Science 2024-05-30 Zhuo Huang , Chang Liu , Yinpeng Dong , Hang Su , Shibao Zheng , Tongliang Liu

Despite the remarkable multimodal capabilities of Large Vision-Language Models (LVLMs), discrepancies often occur between visual inputs and textual outputs--a phenomenon we term visual hallucination. This critical reliability gap poses…

Computer Vision and Pattern Recognition · Computer Science 2025-06-25 Tao Huang , Zhekun Liu , Rui Wang , Yang Zhang , Liping Jing

Instruction tuned Large Vision Language Models (LVLMs) have significantly advanced in generalizing across a diverse set of multi-modal tasks, especially for Visual Question Answering (VQA). However, generating detailed responses that are…

Computer Vision and Pattern Recognition · Computer Science 2024-02-13 Anisha Gunjal , Jihan Yin , Erhan Bas

Hallucinations in Large Language Models (LLMs) -- generations that are plausible but factually unfaithful -- remain a critical barrier to high-stakes deployment. Current detection methods typically rely on computationally expensive external…

Artificial Intelligence · Computer Science 2026-01-23 Manish Bhatt

Large vision-language models (LVLMs) suffer from hallucination, resulting in misalignment between the output textual response and the input visual content. Recent research indicates that the over-reliance on the Large Language Model (LLM)…

Computer Vision and Pattern Recognition · Computer Science 2024-11-06 Yuxi Xie , Guanzhen Li , Xiao Xu , Min-Yen Kan

Multimodal Large Language Models (MLLMs) suffer from cross-modal hallucinations, where one modality inappropriately influences generation about another, leading to fabricated output. This exposes a more fundamental deficiency in…

Artificial Intelligence · Computer Science 2026-01-30 Sangyun Chung , Se Yeon Kim , Youngchae Chee , Yong Man Ro

Vision-Language Models (VLMs) have shown solid ability for multimodal understanding of both visual and language contexts. However, existing VLMs often face severe challenges of hallucinations, meaning that VLMs tend to generate responses…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Jinjin Cao , Zhiyang Chen , Zijun Wang , Liyuan Ma , Weijian Luo , Guojun Qi

Despite their impressive capabilities, large language models (LLMs) have been observed to generate responses that include inaccurate or fabricated information, a phenomenon commonly known as ``hallucination''. In this work, we propose a…

Computation and Language · Computer Science 2024-03-12 Yue Zhang , Leyang Cui , Wei Bi , Shuming Shi

Large Language Models (LLMs) demonstrate significant capabilities in processing natural language data, promising efficient knowledge extraction from diverse textual sources to enhance situational awareness and support decision-making.…

Computation and Language · Computer Science 2024-06-04 Fatemeh Shiri , Van Nguyen , Farhad Moghimifar , John Yoo , Gholamreza Haffari , Yuan-Fang Li

Recent advancements in Large Vision-Language Models (LVLMs) have demonstrated significant progress across multiple domains. However, these models still face the inherent challenge of integrating vision and language for collaborative…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Jiabing Yang , Chenhang Cui , Yiyang Zhou , Yixiang Chen , Peng Xia , Ying Wei , Tao Yu , Yan Huang , Liang Wang