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Visual hallucination (VH) means that a multi-modal LLM (MLLM) imagines incorrect details about an image in visual question answering. Existing studies find VH instances only in existing image datasets, which results in biased understanding…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Wen Huang , Hongbin Liu , Minxin Guo , Neil Zhenqiang Gong

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

Given the higher information load processed by large vision-language models (LVLMs) compared to single-modal LLMs, detecting LVLM hallucinations requires more human and time expense, and thus rise a wider safety concerns. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Ruiyang Zhang , Hu Zhang , Zhedong Zheng

Visual language models (VLMs) have the potential to transform medical workflows. However, the deployment is limited by sycophancy. Despite this serious threat to patient safety, a systematic benchmark remains lacking. This paper addresses…

Computer Vision and Pattern Recognition · Computer Science 2026-05-29 Juangui Xu , Zikun Guo , Jingwei Lv , Hongbin Lin , Shu Yang , Jun Wen , Di Wang , Lijie Hu

During reasoning in vision-language models (VLMs), false positive (FP) reasoning occurs when a model produces the correct answer but follows an incorrect reasoning path, resulting in undermined reasoning reliability. Existing approaches…

Computer Vision and Pattern Recognition · Computer Science 2025-11-06 Ben Zhang , LuLu Yu , Lei Gao , QuanJiang Guo , Jing Liu , Hui Gao

Despite their linguistic competence, Large Language Models (LLMs) often struggle to reason reliably and flexibly. To identify these shortcomings, we introduce the Non-Linear Reasoning (NLR) dataset, a collection of 55 unique, hand-designed…

Computation and Language · Computer Science 2025-12-02 Nasim Borazjanizadeh , Steven T. Piantadosi

Large Language Models (LLMs) have revolutionized natural language processing and demonstrated impressive capabilities in various tasks. Unfortunately, they are prone to hallucinations, where the model exposes incorrect or false information…

Computation and Language · Computer Science 2023-10-13 Patrik Puchert , Poonam Poonam , Christian van Onzenoodt , Timo Ropinski

Recent advances in vision-language models (VLMs) have greatly improved cross-modal semantic understanding, yet significant limitations remain in fine-grained discrimination and deep causal reasoning tasks. Existing VLMs often rely on…

Machine Learning · Computer Science 2025-06-24 Jusheng Zhang , Kaitong Cai , Yijia Fan , Jian Wang , Keze Wang

Recent advancements in multimodal large language models (MLLMs) have shown unprecedented capabilities in advancing various vision-language tasks. However, MLLMs face significant challenges with hallucinations, and misleading outputs that do…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Shengqiong Wu , Hao Fei , Liangming Pan , William Yang Wang , Shuicheng Yan , Tat-Seng Chua

Vision Language Models (VLMs) have demonstrated remarkable potential in multimodal reasoning, yet they inherently suffer from spatial blindness and logical hallucinations when interpreting densely structured engineering content, such as…

Multiagent Systems · Computer Science 2026-03-25 Guanyuan Pan , Shuai Wang , Yugui Lin , Tiansheng Zhou , Pietro Liò , Zhenxin Zhao , Yaqi Wang

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

Vision-language models (VLMs) have recently demonstrated strong efficacy as visual assistants that can parse natural queries about the visual content and generate human-like outputs. In this work, we explore the ability of these models to…

Computation and Language · Computer Science 2024-03-21 Yangyi Chen , Karan Sikka , Michael Cogswell , Heng Ji , Ajay Divakaran

Recent large vision-language models (LVLMs) have demonstrated impressive reasoning ability by generating long chain-of-thought (CoT) responses. However, CoT reasoning in multimodal contexts is highly vulnerable to visual hallucination…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Yongchang Zhang , Oliver Ma , Tianyi Liu , Guangquan Zhou , Yang Chen

General-purpose large Vision-Language Models (VLMs) demonstrate strong capabilities in generating detailed descriptions for natural images. However, their performance in the medical domain remains suboptimal, even for relatively…

Computer Vision and Pattern Recognition · Computer Science 2025-10-23 Yifan Li , Fenghe Tang , Yingtai Li , Shaohua Kevin Zhou

Large language models (LLMs) hallucinate with confidence: their outputs can be fluent, authoritative, and simply wrong. In medical, legal, and scientific applications this failure causes direct harm, and detecting it from internal model…

Computation and Language · Computer Science 2026-05-19 Khizar Hussain , Murat Kantarcioglu

Reasoning-augmented vision language models (VLMs) generate explicit chains of thought that promise greater capability and transparency but also introduce new failure modes: models may reach correct answers via visually unfaithful…

Computer Vision and Pattern Recognition · Computer Science 2025-12-22 Rheeya Uppaal , Phu Mon Htut , Min Bai , Nikolaos Pappas , Zheng Qi , Sandesh Swamy

Recent work shows that text-only reinforcement learning with verifiable rewards (RLVR) can match or outperform image-text RLVR on multimodal medical VQA benchmarks, suggesting current evaluation protocols may fail to measure causal visual…

Computer Vision and Pattern Recognition · Computer Science 2026-03-05 Anas Zafar , Leema Krishna Murali , Ashish Vashist

Data visualization principles, derived from decades of research in design and perception, ensure proper visual communication. While prior work has shown that large language models (LLMs) can generate charts or flag misleading figures, it…

Computer Vision and Pattern Recognition · Computer Science 2026-02-24 Martin Sinnona , Valentin Bonas , Viviana Siless , Emmanuel Iarussi

Visual Language Models (VLMs) achieve promising results in medical reasoning but struggle with hallucinations, vague descriptions, inconsistent logic and poor localization. To address this, we propose a agent framework named Medical Visual…

Artificial Intelligence · Computer Science 2025-10-22 Guangfu Guo , Xiaoqian Lu , Yue Feng

Vision-language models (VLMs) are increasingly augmented with continuous or latent non-textual tokens intended to support "visual thinking." Despite improved task accuracy, this alone does not show that models actually use these tokens for…

Computer Vision and Pattern Recognition · Computer Science 2026-05-22 Tianyi Zhang , Mahtab Bigverdi , Ranjay Krishna