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Many practical vision-language applications require models that understand negation, e.g., when using natural language to retrieve images which contain certain objects but not others. Despite advancements in vision-language models (VLMs)…

Computer Vision and Pattern Recognition · Computer Science 2025-05-14 Kumail Alhamoud , Shaden Alshammari , Yonglong Tian , Guohao Li , Philip Torr , Yoon Kim , Marzyeh Ghassemi

Vision-Language Models (VLMs) have advanced multi-modal tasks like image captioning, visual question answering, and reasoning. However, they often generate hallucinated outputs inconsistent with the visual context or prompt, limiting…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Shawn Li , Jiashu Qu , Yuxiao Zhou , Yuehan Qin , Tiankai Yang , Yue Zhao

Recent advancements in Unified Multimodal Models (UMMs) have enabled remarkable image understanding and generation capabilities. However, while models like Gemini-2.5-Flash-Image show emerging abilities to reason over multiple related…

Computer Vision and Pattern Recognition · Computer Science 2026-02-24 Mingrui Wu , Hang Liu , Jiayi Ji , Xiaoshuai Sun , Rongrong Ji

This work introduces panoptic captioning, a novel task striving to seek the minimum text equivalent of images, which has broad potential applications. We take the first step towards panoptic captioning by formulating it as a task of…

Computer Vision and Pattern Recognition · Computer Science 2025-11-26 Kun-Yu Lin , Hongjun Wang , Weining Ren , Kai Han

Language models, particularly generative models, are susceptible to hallucinations, generating outputs that contradict factual knowledge or the source text. This study explores methods for detecting hallucinations in three SemEval-2024 Task…

Visual captioning benchmarks have become outdated with the emergence of modern multimodal large language models (MLLMs), as the brief ground-truth sentences and traditional metrics fail to assess detailed captions effectively. While recent…

Computer Vision and Pattern Recognition · Computer Science 2025-11-27 Zhihang Liu , Chen-Wei Xie , Bin Wen , Feiwu Yu , Jixuan Chen , Pandeng Li , Boqiang Zhang , Nianzu Yang , Yinglu Li , Zuan Gao , Yun Zheng , Hongtao Xie

Large vision-language models (LVLMs) have demonstrated remarkable capabilities in multimodal understanding and generation tasks. However, these models occasionally generate hallucinatory texts, resulting in descriptions that seem reasonable…

Computer Vision and Pattern Recognition · Computer Science 2024-12-11 Jiaqi Fan , Jianhua Wu , Hongqing Chu , Quanbo Ge , Bingzhao Gao

With the advent of rich visual representations and pre-trained language models, video captioning has seen continuous improvement over time. Despite the performance improvement, video captioning models are prone to hallucination.…

Computer Vision and Pattern Recognition · Computer Science 2022-09-29 Nasib Ullah , Partha Pratim Mohanta

This project aims to create an automated image captioning system that generates natural language descriptions for input images by integrating techniques from computer vision and natural language processing. We employ various different…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Joshua Adrian Cahyono , Jeremy Nathan Jusuf

When asked to summarize articles or answer questions given a passage, large language models (LLMs) can hallucinate details and respond with unsubstantiated answers that are inaccurate with respect to the input context. This paper describes…

Computation and Language · Computer Science 2024-10-04 Yung-Sung Chuang , Linlu Qiu , Cheng-Yu Hsieh , Ranjay Krishna , Yoon Kim , James Glass

This research paper focuses on the challenges posed by hallucinations in large language models (LLMs), particularly in the context of the medical domain. Hallucination, wherein these models generate plausible yet unverified or incorrect…

Computation and Language · Computer Science 2023-10-17 Ankit Pal , Logesh Kumar Umapathi , Malaikannan Sankarasubbu

Large Vision-Language Models (LVLMs) have recently achieved impressive results in multimodal tasks such as image captioning and visual question answering. However, they remain prone to object hallucination -- generating descriptions of…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Jinlin Li , Yuran Wang , Yifei Yuan , Xiao Zhou , Yingying Zhang , Xixian Yong , Yefeng Zheng , Xian Wu

Long-form image captioning exposes a reward granularity problem in RL: captions are judged as whole sequences, while the important errors occur at the level of individual visual claims. A good dense caption should be both faithful and…

Machine Learning · Computer Science 2026-05-26 Tianle Li , Xuyang Shen , Yan Ma , Rongxin Guo , Shaoxiang Chen , Jiacheng Chen , Haochen Wang , Hongyang Tang , Yucong Zhou , Yu Cheng

Retinal image analysis is crucial for diagnosing and treating eye diseases, yet generating accurate medical reports from images remains challenging due to variability in image quality and pathology, especially with limited labeled data.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-24 Teja Krishna Cherukuri , Nagur Shareef Shaik , Jyostna Devi Bodapati , Dong Hye Ye

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

This work introduces a novel methodology for the automatic detection of hallucinations generated during large language model (LLM) inference. The proposed approach is based on a systematic taxonomy and controlled reproduction of diverse…

Computation and Language · Computer Science 2025-10-08 Maksym Zavhorodnii , Dmytro Dehtiarov , Anna Konovalenko

Today's Large Language Models (LLMs) have showcased exemplary capabilities, ranging from simple text generation to advanced image processing. Such models are currently being explored for in-vehicle services such as supporting perception…

Computer Vision and Pattern Recognition · Computer Science 2024-09-20 Malsha Ashani Mahawatta Dona , Beatriz Cabrero-Daniel , Yinan Yu , Christian Berger

Hallucination, or the generation of incorrect or fabricated information, remains a critical challenge in large language models (LLMs), particularly in high-stake domains such as legal question answering (QA). In order to mitigate the…

Computation and Language · Computer Science 2025-01-14 Yinghao Hu , Leilei Gan , Wenyi Xiao , Kun Kuang , Fei Wu

Despite the outstanding performance in multimodal tasks, Large Vision-Language Models (LVLMs) have been plagued by the issue of hallucination, i.e., generating content that is inconsistent with the corresponding visual inputs. While…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Bei Yan , Jie Zhang , Zheng Yuan , Shiguang Shan , Xilin Chen

SemEval-2025 Task 3 (Mu-SHROOM) focuses on detecting hallucinations in content generated by various large language models (LLMs) across multiple languages. This task involves not only identifying the presence of hallucinations but also…

Computation and Language · Computer Science 2025-05-13 Jiaying Hong , Thanet Markchom , Jianfei Xu , Tong Wu , Huizhi Liang