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Large Vision Language Models (LVLMs) achieve strong multimodal reasoning but frequently exhibit hallucinations and incorrect responses with high certainty, which hinders their usage in high-stakes domains. Existing verbalized confidence…

Computer Vision and Pattern Recognition · Computer Science 2026-04-13 Wenyi Xiao , Xinchi Xu , Leilei Gan

Counting serves as a simple but powerful test of a Large Vision-Language Model's (LVLM's) reasoning; it forces the model to identify each individual object and then add them all up. In this study, we investigate how LVLMs implement counting…

Computer Vision and Pattern Recognition · Computer Science 2026-03-20 Liwei Che , Zhiyu Xue , Yihao Quan , Benlin Liu , Zeru Shi , Michelle Hurst , Jacob Feldman , Ruixiang Tang , Ranjay Krishna , Vladimir Pavlovic

We investigate fine-tuning Vision-Language Models (VLMs) for multi-task medical image understanding, focusing on detection, localization, and counting of findings in medical images. Our objective is to evaluate whether instruction-tuned…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Sushant Gautam , Michael A. Riegler , Pål Halvorsen

Multimodal Large Language Models (MLLMs) demonstrate remarkable fluency in understanding visual scenes, yet they exhibit a critical lack in a fundamental cognitive skill: object counting. This blind spot severely limits their reliability in…

Artificial Intelligence · Computer Science 2025-09-10 Jayant Sravan Tamarapalli , Rynaa Grover , Nilay Pande , Sahiti Yerramilli

Vision-Language Models (VLMs) have shown strong multimodal reasoning capabilities on Visual-Question-Answering (VQA) benchmarks. However, their robustness against textual misinformation remains under-explored. While existing research has…

Computation and Language · Computer Science 2026-01-28 Chi Zhang , Wenxuan Ding , Jiale Liu , Mingrui Wu , Qingyun Wu , Ray Mooney

Vision-language models (VLMs) exhibit a systematic bias when confronted with classic optical illusions: they overwhelmingly predict the illusion as "real" regardless of whether the image has been counterfactually modified. We present a…

Computer Vision and Pattern Recognition · Computer Science 2026-04-01 Xuesong Wang , Harry Wang

Recent advances in large vision-language models (LVLMs) have amplified concerns about fairness, yet existing evaluations remain confined to demographic attributes and often conflate fairness with refusal behavior. This paper broadens the…

Computer Vision and Pattern Recognition · Computer Science 2025-12-03 Zaiying Zhao , Toshihiko Yamasaki

Large language models (LLMs) have shown remarkable ability in various language tasks, especially with their emergent in-context learning capability. Extending LLMs to incorporate visual inputs, large vision-language models (LVLMs) have…

Machine Learning · Computer Science 2025-10-13 Aneesh Komanduri , Karuna Bhaila , Xintao Wu

Vision-Language Models (VLMs) have demonstrated remarkable progress in chart understanding, largely driven by supervised fine-tuning (SFT) on increasingly large synthetic datasets. However, scaling SFT data alone is inefficient and…

Computation and Language · Computer Science 2026-05-12 Jianzhu Bao , Haozhen Zhang , Kuicai Dong , Bozhi Wu , Sarthak Ketanbhai Modi , Zi Pong Lim , Yon Shin Teo , Wenya Wang

Visual reasoning is central to human cognition, enabling individuals to interpret and abstractly understand their environment. Although recent Multimodal Large Language Models (MLLMs) have demonstrated impressive performance across language…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Jing Bi , Junjia Guo , Susan Liang , Guangyu Sun , Luchuan Song , Yunlong Tang , Jinxi He , Jiarui Wu , Ali Vosoughi , Chen Chen , Chenliang Xu

Vision Language Models (VLMs) exhibit persistent hallucinations in counting tasks, with accuracy substantially lower than other visual reasoning tasks (excluding sentiment). This phenomenon persists even in state-of-the-art…

Computer Vision and Pattern Recognition · Computer Science 2026-03-12 Boyuan Chen , Minghao Shao , Siddharth Garg , Ramesh Karri , Muhammad Shafique

Vision-Language Models (VLMs) have achieved impressive performance in cross-modal understanding across textual and visual inputs, yet existing benchmarks predominantly focus on pure-text queries. In real-world scenarios, language also…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Qing'an Liu , Juntong Feng , Yuhao Wang , Xinzhe Han , Yujie Cheng , Yue Zhu , Haiwen Diao , Yunzhi Zhuge , Huchuan Lu

While Large Vision-Language Models (VLMs) excel at interpolation, they suffer catastrophic failures in systematic generalization, most notably in visual counting. In this work, we investigate this extrapolation bottleneck by deconstructing…

Multimedia · Computer Science 2026-05-29 Xingzhou Pang , Yifan Hou , Junling Wang , Mrinmaya Sachan

Leading approaches in machine vision employ different architectures for different tasks, trained on costly task-specific labeled datasets. This complexity has held back progress in areas, such as robotics, where robust task-general…

Computer Vision and Pattern Recognition · Computer Science 2023-06-06 Daniel M. Bear , Kevin Feigelis , Honglin Chen , Wanhee Lee , Rahul Venkatesh , Klemen Kotar , Alex Durango , Daniel L. K. Yamins

Vision-language modeling (VLM) aims to bridge the information gap between images and natural language. Under the new paradigm of first pre-training on massive image-text pairs and then fine-tuning on task-specific data, VLM in the remote…

Computer Vision and Pattern Recognition · Computer Science 2025-06-11 Xingxing Weng , Chao Pang , Gui-Song Xia

Existing image-text modality alignment in Vision Language Models (VLMs) treats each text token equally in an autoregressive manner. Despite being simple and effective, this method results in sub-optimal cross-modal alignment by…

Computer Vision and Pattern Recognition · Computer Science 2024-11-06 Xin Xiao , Bohong Wu , Jiacong Wang , Chunyuan Li , Xun Zhou , Haoyuan Guo

Vision-Language Models (VLMs) have demonstrated strong capability in a wide range of tasks such as visual recognition, document parsing, and visual grounding. Nevertheless, recent work shows that while VLMs often manage to capture the…

Computer Vision and Pattern Recognition · Computer Science 2026-04-20 Chengxin Liu , Wonseok Choi , Chenshuang Zhang , Tae-Hyun Oh

Visual Language Models (VLMs) are powerful generative tools but often produce factually inaccurate outputs due to a lack of robust reasoning capabilities. While extensive research has been conducted on integrating external knowledge for…

Artificial Intelligence · Computer Science 2025-11-26 Shamima Hossain

Multimodal large language models (MLLMs) that integrate visual and textual reasoning leverage chain-of-thought (CoT) prompting to tackle complex visual tasks, yet continue to exhibit visual hallucinations and an over-reliance on textual…

Computer Vision and Pattern Recognition · Computer Science 2025-10-24 Jing Bi , Guangyu Sun , Ali Vosoughi , Chen Chen , Chenliang Xu

Significant research efforts have been made to scale and improve vision-language model (VLM) training approaches. Yet, with an ever-growing number of benchmarks, researchers are tasked with the heavy burden of implementing each protocol,…

Computer Vision and Pattern Recognition · Computer Science 2024-08-12 Haider Al-Tahan , Quentin Garrido , Randall Balestriero , Diane Bouchacourt , Caner Hazirbas , Mark Ibrahim