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Large vision-language models (LVLMs) suffer from hallucination a lot, generating responses that apparently contradict to the image content occasionally. The key problem lies in its weak ability to comprehend detailed content in a…

Computer Vision and Pattern Recognition · Computer Science 2023-11-29 Zhiyang Chen , Yousong Zhu , Yufei Zhan , Zhaowen Li , Chaoyang Zhao , Jinqiao Wang , Ming Tang

Hallucination poses a challenge to the deployment of large vision-language models (LVLMs) in applications. Unlike in large language models (LLMs), hallucination in LVLMs often arises from misalignments between visual inputs and textual…

Computer Vision and Pattern Recognition · Computer Science 2024-10-23 Sheng Liu , Haotian Ye , Lei Xing , James Zou

Multi-modal large language models (MLLMs) have been shown to efficiently integrate natural language with visual information to handle multi-modal tasks. However, MLLMs still face a fundamental limitation of hallucinations, where they tend…

Computer Vision and Pattern Recognition · Computer Science 2024-02-27 Chaoya Jiang , Haiyang Xu , Mengfan Dong , Jiaxing Chen , Wei Ye , Ming Yan , Qinghao Ye , Ji Zhang , Fei Huang , Shikun Zhang

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

Contrastive decoding strategies are widely used to mitigate object hallucinations in multimodal large language models (MLLMs). By reducing over-reliance on language priors, these strategies ensure that generated content remains closely…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Hao Yin , Guangzong Si , Zilei Wang

Contrastive decoding strategies are widely used to reduce object hallucinations in multimodal large language models (MLLMs). These methods work by constructing contrastive samples to induce hallucinations and then suppressing them in the…

Computation and Language · Computer Science 2025-10-08 Hao Yin , Guangzong Si , Zilei Wang

The Large Visual Language Models (LVLMs) enhances user interaction and enriches user experience by integrating visual modality on the basis of the Large Language Models (LLMs). It has demonstrated their powerful information processing and…

Artificial Intelligence · Computer Science 2024-10-22 Wei Lan , Wenyi Chen , Qingfeng Chen , Shirui Pan , Huiyu Zhou , Yi Pan

Large vision-language models (LVLMs) often hallucinate content that is fluent yet unsupported by the image, limiting their reliability in real-world deployment. We show that a key failure mode arises from route competition: even when visual…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Zhe Cheng , Wenyu Chen , Fode Zhang , Dehuan Shen

Large Vision-Language Models (LVLMs) demonstrate remarkable capabilities in multimodal tasks, but visual object hallucination remains a persistent issue. It refers to scenarios where models generate inaccurate visual object-related…

Computer Vision and Pattern Recognition · Computer Science 2025-05-06 Liqiang Jing , Guiming Hardy Chen , Ehsan Aghazadeh , Xin Eric Wang , Xinya Du

Large Language Models (LLMs) are powerful linguistic engines but remain susceptible to hallucinations: plausible-sounding outputs that are factually incorrect or unsupported. In this work, we present a mathematically grounded framework to…

Computation and Language · Computer Science 2025-11-20 Moses Kiprono

Large Language Models (LLMs) often hallucinate, producing unfaithful or factually incorrect outputs by misrepresenting the provided context or incorrectly recalling internal knowledge. Recent studies have identified specific attention heads…

Computation and Language · Computer Science 2024-10-25 Aryo Pradipta Gema , Chen Jin , Ahmed Abdulaal , Tom Diethe , Philip Teare , Beatrice Alex , Pasquale Minervini , Amrutha Saseendran

Large-scale vision-language pre-trained (VLP) models are prone to hallucinate non-existent visual objects when generating text based on visual information. In this paper, we systematically study the object hallucination problem from three…

Computation and Language · Computer Science 2023-02-13 Wenliang Dai , Zihan Liu , Ziwei Ji , Dan Su , Pascale Fung

Hallucinations in Multimodal Large Language Models (MLLMs) where generated responses fail to accurately reflect the given image pose a significant challenge to their reliability. To address this, we introduce ConVis, a novel training-free…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Yeji Park , Deokyeong Lee , Junsuk Choe , Buru Chang

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

Over-reliance on language priors is a major cause of hallucinations in Large Vision-Language Models (LVLMs), often leading to outputs that are linguistically plausible but visually inconsistent. Recent studies have explored contrastive…

Computer Vision and Pattern Recognition · Computer Science 2025-09-17 Jianfei Zhao , Feng Zhang , Xin Sun , Lingxing Kong , Zhixing Tan , Chong Feng

Multimodal Large Language Models (MLLMs) deliver detailed responses on vision-language tasks, yet remain susceptible to object hallucination (introducing objects not present in the image), undermining reliability in practice. Prior efforts…

Machine Learning · Computer Science 2026-02-26 Shiwei Tan , Hengyi Wang , Weiyi Qin , Qi Xu , Zhigang Hua , Hao Wang

Hallucination remains a major challenge in multimodal large language models (MLLMs). To address this, various contrastive decoding (CD) methods have been proposed that contrasts original logits with hallucinated logits generated from…

Computer Vision and Pattern Recognition · Computer Science 2025-10-01 Chaeyoung Jung , Youngjoon Jang , Joon Son Chung

Large Vision-Language Models (LVLMs) demonstrate impressive capabilities in generating detailed and coherent responses from visual inputs. However, they are prone to generate hallucinations due to an over-reliance on language priors. To…

Artificial Intelligence · Computer Science 2025-02-20 Kyungmin Min , Minbeom Kim , Kang-il Lee , Dongryeol Lee , Kyomin Jung

Although Visual-Language Models (VLMs) have shown impressive capabilities in tasks like visual question answering and image captioning, they still struggle with hallucinations. Analysis of attention distribution in these models shows that…

Computer Vision and Pattern Recognition · Computer Science 2024-09-11 Xiaoyu Liang , Jiayuan Yu , Lianrui Mu , Jiedong Zhuang , Jiaqi Hu , Yuchen Yang , Jiangnan Ye , Lu Lu , Jian Chen , Haoji Hu

Recent advancements in Multimodal Large Language Models (MLLMs) have enabled them to effectively integrate vision and language, addressing a variety of downstream tasks. However, despite their significant success, these models still exhibit…

Computer Vision and Pattern Recognition · Computer Science 2025-06-10 Zixian Gao , Chao Yang , Zhanhui Zhou , Xing Xu , Chaochao Lu