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Large Vision-Language Models (LVLMs) have recently achieved remarkable success. However, LVLMs are still plagued by the hallucination problem, which limits the practicality in many scenarios. Hallucination refers to the information of…

Machine Learning · Computer Science 2023-10-11 Junyang Wang , Yiyang Zhou , Guohai Xu , Pengcheng Shi , Chenlin Zhao , Haiyang Xu , Qinghao Ye , Ming Yan , Ji Zhang , Jihua Zhu , Jitao Sang , Haoyu Tang

Large Multimodal Models (LMMs) have achieved impressive progress in visual perception and reasoning. However, when confronted with visually ambiguous or non-semantic scene text, they often struggle to accurately spot and understand the…

Computer Vision and Pattern Recognition · Computer Science 2025-10-08 Yan Shu , Hangui Lin , Yexin Liu , Yan Zhang , Gangyan Zeng , Yan Li , Yu Zhou , Ser-Nam Lim , Harry Yang , Nicu Sebe

Large language models (LLMs) have achieved remarkable success in various tasks, yet they remain vulnerable to faithfulness hallucinations, where the output does not align with the input. In this study, we investigate whether social bias…

Computation and Language · Computer Science 2025-08-12 Zhenliang Zhang , Junzhe Zhang , Xinyu Hu , HuiXuan Zhang , Xiaojun Wan

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

Large Vision Language Models (LVLMs) have shown remarkable capabilities in multimodal tasks like visual question answering or image captioning. However, inconsistencies between the visual information and the generated text, a phenomenon…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Laura Fieback , Jakob Spiegelberg , Hanno Gottschalk

Large vision-language models (LVLMs) have shown remarkable abilities in understanding visual information with human languages. However, LVLMs still suffer from object hallucination, which is the problem of generating descriptions that…

Machine Learning · Computer Science 2024-03-19 Yiyang Zhou , Chenhang Cui , Jaehong Yoon , Linjun Zhang , Zhun Deng , Chelsea Finn , Mohit Bansal , Huaxiu Yao

Hallucination detection in captions (HalDec) assesses a vision-language model's ability to correctly align image content with text by identifying errors in captions that misrepresent the image. Beyond evaluation, effective hallucination…

Computer Vision and Pattern Recognition · Computer Science 2026-03-25 Kuniaki Saito , Risa Shinoda , Shohei Tanaka , Tosho Hirasawa , Fumio Okura , Yoshitaka Ushiku

Hallucination detection in captions (HalDec) assesses a vision-language model's ability to correctly align image content with text by identifying errors in captions that misrepresent the image. Beyond evaluation, effective hallucination…

Computer Vision and Pattern Recognition · Computer Science 2026-03-25 Kuniaki Saito , Risa Shinoda , Shohei Tanaka , Tosho Hirasawa , Fumio Okura , Yoshitaka Ushiku

Large Vision-Language Models (LVLMs) are an extension of Large Language Models (LLMs) that facilitate processing both image and text inputs, expanding AI capabilities. However, LVLMs struggle with object hallucinations due to their reliance…

Computation and Language · Computer Science 2024-08-12 Avshalom Manevich , Reut Tsarfaty

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

Hallucinations in large vision-language models (LVLMs) are a significant challenge, i.e., generating objects that are not presented in the visual input, which impairs their reliability. Recent studies often attribute hallucinations to a…

Computation and Language · Computer Science 2025-08-13 Yuying Shang , Xinyi Zeng , Yutao Zhu , Xiao Yang , Zhengwei Fang , Jingyuan Zhang , Jiawei Chen , Zinan Liu , Yu Tian

Recent studies have examined attention dynamics in large vision-language models (LVLMs) to detect hallucinations. However, existing approaches remain limited in reliably distinguishing hallucinated from factually grounded outputs, as they…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Xiaofeng Zhang , Yuanchao Zhu , Chaochen Gu , Xiaosong Yuan , Qiyan Zhao , Jiawei Cao , Feilong Tang , Sinan Fan , Yaomin Shen , Chen Shen , Hao Tang

Vision Language models (VLMs) often hallucinate non-existent objects. Detecting hallucination is analogous to detecting deception: a single final statement is insufficient, one must examine the underlying reasoning process. Yet existing…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Abin Shoby , Ta Duc Huy , Tuan Dung Nguyen , Minh Khoi Ho , Qi Chen , Anton van den Hengel , Phi Le Nguyen , Johan W. Verjans , Vu Minh Hieu Phan

Object hallucination has been an Achilles' heel which hinders the broader applications of large vision-language models (LVLMs). Object hallucination refers to the phenomenon that the LVLMs claim non-existent objects in the image. To…

Computer Vision and Pattern Recognition · Computer Science 2024-07-01 Junfei Wu , Qiang Liu , Ding Wang , Jinghao Zhang , Shu Wu , Liang Wang , Tieniu Tan

Large Vision Language Models (LVLMs) are increasingly integral to healthcare applications, including medical visual question answering and imaging report generation. While these models inherit the robust capabilities of foundational Large…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Jiawei Chen , Dingkang Yang , Tong Wu , Yue Jiang , Xiaolu Hou , Mingcheng Li , Shunli Wang , Dongling Xiao , Ke Li , Lihua Zhang

Large Language Models (LLMs) are increasingly applied to medical imaging tasks, including image interpretation and synthetic image generation. However, these models often produce hallucinations, which are confident but incorrect outputs…

Image and Video Processing · Electrical Eng. & Systems 2025-08-12 Anindya Bijoy Das , Shahnewaz Karim Sakib , Shibbir Ahmed

Large language models (LLMs) are increasingly being adopted as the cognitive core of embodied agents. However, inherited hallucinations, which stem from failures to ground user instructions in the observed physical environment, can lead to…

Vision-language models (VLMs) often struggle to generate accurate and detailed captions for high-resolution images since they are typically pre-trained on low-resolution inputs (e.g., 224x224 or 336x336 pixels). Downscaling high-resolution…

Computer Vision and Pattern Recognition · Computer Science 2025-11-03 Hankyeol Lee , Gawon Seo , Kyounggyu Lee , Dogun Kim , Kyungwoo Song , Jiyoung Jung

Despite the impressive performance of vision-language models (VLMs) on downstream tasks, their ability to understand and reason about causal relationships in visual inputs remains unclear. Robust causal reasoning is fundamental to solving…

Computation and Language · Computer Science 2026-02-05 Zhaotian Weng , Haoxuan Li , Xin Eric Wang , Kuan-Hao Huang , Jieyu Zhao

Despite Multimodal Large Language Models (MLLMs) having shown impressive capabilities, they may suffer from hallucinations. Empirically, we find that MLLMs attend disproportionately to task-irrelevant background regions compared with…

Computation and Language · Computer Science 2025-12-01 Peizheng Guo , Jingyao Wang , Wenwen Qiang , Jiahuan Zhou , Changwen Zheng , Gang Hua