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Large vision-language models (LVLMs) have achieved remarkable performance across diverse multimodal tasks, yet they continue to suffer from hallucinations, generating content that is inconsistent with the visual input. Prior work DHCP…

Computer Vision and Pattern Recognition · Computer Science 2026-05-15 Wei Ding , Yilin Li , Yudong Zhang , Ruobing Xie , Xingwu Sun , Jiansheng Chen , Yu Wang

Multimodal large language models (MLLMs) contribute a powerful mechanism to understanding visual information building on large language models. However, MLLMs are notorious for suffering from hallucinations, especially when generating…

Computer Vision and Pattern Recognition · Computer Science 2024-06-03 Kai Wu , Boyuan Jiang , Zhengkai Jiang , Qingdong He , Donghao Luo , Shengzhi Wang , Qingwen Liu , Chengjie Wang

Multimodal large language models (MLLMs) have achieved remarkable progress, yet the object hallucination remains a critical challenge for reliable deployment. In this paper, we present an in-depth analysis of instruction token embeddings…

Machine Learning · Computer Science 2026-05-13 Runhe Lai , Xinhua Lu , Yanqi Wu , Jinlun Ye , Weijiang Yu , Ruixuan Wang

Multimodal Large Language Models (MLLMs) often generate hallucinations, where the output deviates from the visual content. Given that these hallucinations can take diverse forms, detecting hallucinations at a fine-grained level is essential…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Yuiga Wada , Kazuki Matsuda , Komei Sugiura , Graham Neubig

Multimodal Large Language Models (MLLMs) hallucinate, resulting in an emerging topic of visual hallucination evaluation (VHE). This paper contributes a ChatGPT-Prompted visual hallucination evaluation Dataset (PhD) for objective VHE at a…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Jiazhen Liu , Yuhan Fu , Ruobing Xie , Runquan Xie , Xingwu Sun , Fengzong Lian , Zhanhui Kang , Xirong Li

Despite the effectiveness of vision-language supervised fine-tuning in enhancing the performance of Vision Large Language Models (VLLMs). However, existing visual instruction tuning datasets include the following limitations: (1)…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Yangzhou Liu , Yue Cao , Zhangwei Gao , Weiyun Wang , Zhe Chen , Wenhai Wang , Hao Tian , Lewei Lu , Xizhou Zhu , Tong Lu , Yu Qiao , Jifeng Dai

Large Reasoning Models (LRMs) have shown impressive capabilities in multi-step reasoning tasks. However, alongside these successes, a more deceptive form of model error has emerged--Reasoning Hallucination--where logically coherent but…

Artificial Intelligence · Computer Science 2025-05-20 Zhongxiang Sun , Qipeng Wang , Haoyu Wang , Xiao Zhang , Jun Xu

We investigate the internal representations of vision-language models (VLMs) to address hallucinations, a persistent challenge despite advances in model size and training. We project VLMs' internal image representations to their language…

Computer Vision and Pattern Recognition · Computer Science 2025-02-12 Nick Jiang , Anish Kachinthaya , Suzie Petryk , Yossi Gandelsman

Although Large Vision-Language Models (LVLMs) have demonstrated remarkable performance on downstream tasks, they frequently produce contents that deviate from visual information, leading to object hallucination. To tackle this, recent works…

Computer Vision and Pattern Recognition · Computer Science 2026-05-07 Qiming Li , Zekai Ye , Xiaocheng Feng , Weihong Zhong , Libo Qin , Ruihan Chen , Lei Huang , Baohang Li , Kui Jiang , Yaowei Wang , Ting Liu , Bing Qin

Hallucination remains a fundamental challenge in vision-language models (VLMs), where autoregressive generation may produce linguistically plausible yet physically inconsistent or visually ungrounded responses due to likelihood maximization…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Qinwu Xu

Hallucinations in Large Language Models (LLMs) pose a significant challenge, generating misleading or unverifiable content that undermines trust and reliability. Existing evaluation methods, such as KnowHalu, employ multi-stage verification…

Computation and Language · Computer Science 2026-04-10 Chenggong Zhang , Haopeng Wang , Hexi Meng

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

Vision-Language Models (VLMs) excel at multimodal tasks, but they remain vulnerable to hallucinations that are factually incorrect or ungrounded in the input image. Recent work suggests that hallucination detection using internal…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Ryuhei Miyazato , Shunsuke Kitada , Kei Harada

Multimodal Large Language Models (MLLMs) excel in vision-language tasks such as image captioning but remain prone to object hallucinations, where they describe objects that do not appear in the image. To mitigate this, we propose LISA, a…

Computer Vision and Pattern Recognition · Computer Science 2025-11-14 Zhihui Guo , Xin Man , Hui Xu , Jie Shao , Zhiguo Jiang , Xianchao Zhang , Heng Tao Shen

Despite the impressive capabilities of Large Vision-Language Models (LVLMs), they remain susceptible to hallucinations-generating content that is inconsistent with the input image. Existing training-free hallucination mitigation methods…

Machine Learning · Computer Science 2025-05-20 Kai Tang , Jinhao You , Xiuqi Ge , Hanze Li , Yichen Guo , Xiande Huang

Large Vision-Language Models (LVLMs) extend large language models with visual understanding, but remain vulnerable to hallucination, where outputs are fluent yet inconsistent with images. Recent studies link this issue to language bias-the…

Computation and Language · Computer Science 2026-05-26 Yangneng Chen , Jing Li

Hallucinations in large language models (LLMs) refer to the phenomenon of LLMs producing responses that are coherent yet factually inaccurate. This issue undermines the effectiveness of LLMs in practical applications, necessitating research…

Computation and Language · Computer Science 2024-06-11 Weihang Su , Changyue Wang , Qingyao Ai , Yiran HU , Zhijing Wu , Yujia Zhou , Yiqun Liu

Multimodal large language models (MLLMs) have revolutionized the landscape of AI, demonstrating impressive capabilities in tackling complex vision and audio-language tasks. However, a critical challenge remains: these models often suffer…

Machine Learning · Computer Science 2026-05-05 Itai Allouche , Joseph Keshet

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

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