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The increasing reliance on natural language generation (NLG) models, particularly large language models, has raised concerns about the reliability and accuracy of their outputs. A key challenge is hallucination, where models produce…

Computation and Language · Computer Science 2025-10-23 Fan Xu , Xinyu Hu , Zhenghan Yu , Li Lin , Xu Zhang , Yang Zhang , Wei Zhou , Jinjie Gu , Xiaojun Wan

Large vision-language models (LVLMs) are prone to hallucinations, where certain contextual cues in an image can trigger the language module to produce overconfident and incorrect reasoning about abnormal or hypothetical objects. While some…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Xiyang Wu , Tianrui Guan , Dianqi Li , Shuaiyi Huang , Xiaoyu Liu , Xijun Wang , Ruiqi Xian , Abhinav Shrivastava , Furong Huang , Jordan Lee Boyd-Graber , Tianyi Zhou , Dinesh Manocha

Artificial intelligence (AI) has transformed imaging inverse problems, from medical diagnostics to Earth observation. Yet deep neural networks can produce hallucinations, realistic-looking but incorrect details, undermining their…

Machine Learning · Statistics 2026-05-14 David Iagaru , Nina M. Gottschling , Anders C. Hansen , Josselin Garnier

We explore the problem of computationally generating special `prime' images that produce optical illusions when physically arranged and viewed in a certain way. First, we propose a formal definition for this problem. Next, we introduce…

Computer Vision and Pattern Recognition · Computer Science 2023-12-08 Ryan Burgert , Xiang Li , Abe Leite , Kanchana Ranasinghe , Michael S. Ryoo

Advancements in Large Language Models (LLMs) and their increasing use in medical question-answering necessitate rigorous evaluation of their reliability. A critical challenge lies in hallucination, where models generate plausible yet…

Computation and Language · Computer Science 2025-02-21 Shrey Pandit , Jiawei Xu , Junyuan Hong , Zhangyang Wang , Tianlong Chen , Kaidi Xu , Ying Ding

The troubling rise of hallucination presents perhaps the most significant impediment to the advancement of responsible AI. In recent times, considerable research has focused on detecting and mitigating hallucination in Large Language Models…

Artificial Intelligence · Computer Science 2024-04-02 Anku Rani , Vipula Rawte , Harshad Sharma , Neeraj Anand , Krishnav Rajbangshi , Amit Sheth , Amitava Das

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

Autonomous systems are soon to be ubiquitous, spanning manufacturing, agriculture, healthcare, entertainment, and other industries. Most of these systems are developed with modular sub-components for decision-making, planning, and control…

Artificial Intelligence · Computer Science 2025-02-12 Neeloy Chakraborty , Melkior Ornik , Katherine Driggs-Campbell

Hallucination remains a central failure mode of large language models, but existing benchmarks operationalize it inconsistently across summarization, question answering, retrieval-augmented generation, and agentic interaction. This…

Computation and Language · Computer Science 2026-05-20 Emmy Liu , Varun Gangal , Michael Yu , Zhuofu Tao , Karan Singh , Sachin Kumar , Steven Y. Feng

Aligning large language models (LLMs) to accurately detect hallucinations remains a significant challenge due to the sophisticated nature of hallucinated text. Recognizing that hallucinated samples typically exhibit higher deceptive quality…

Computation and Language · Computer Science 2025-05-26 Shrey Pandit , Ashwin Vinod , Liu Leqi , Ying Ding

Hallucinations are one of the major issues affecting LLMs, hindering their wide adoption in production systems. While current research solutions for detecting hallucinations are mainly based on heuristics, in this paper we introduce a…

Computation and Language · Computer Science 2025-02-14 Emanuele Ricco , Lorenzo Cima , Roberto Di Pietro

In lossy image compression, models face the challenge of either hallucinating details or generating out-of-distribution samples due to the information bottleneck. This implies that at times, introducing hallucinations is necessary to…

Image and Video Processing · Electrical Eng. & Systems 2025-03-07 Till Aczel , Roger Wattenhofer

Multi-modal Large Language Models (MLLMs) have demonstrated remarkable performance on various visual-language understanding and generation tasks. However, MLLMs occasionally generate content inconsistent with the given images, which is…

Computer Vision and Pattern Recognition · Computer Science 2024-08-06 Peng Ding , Jingyu Wu , Jun Kuang , Dan Ma , Xuezhi Cao , Xunliang Cai , Shi Chen , Jiajun Chen , Shujian Huang

Multimodal hallucination in multimodal large language models (MLLMs) restricts the correctness of MLLMs. However, multimodal hallucinations are multi-sourced and arise from diverse causes. Existing benchmarks fail to adequately distinguish…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Bowen Dong , Minheng Ni , Zitong Huang , Guanglei Yang , Wangmeng Zuo , Lei Zhang

Recent progress in generative AI, including large language models (LLMs) like ChatGPT, has opened up significant opportunities in fields ranging from natural language processing to knowledge discovery and data mining. However, there is also…

Artificial Intelligence · Computer Science 2024-04-03 Navapat Nananukul , Mayank Kejriwal

We fine-tuned a foundational stable diffusion model using X-ray scattering images and their corresponding descriptions to generate new scientific images from given prompts. However, some of the generated images exhibit significant…

Image and Video Processing · Electrical Eng. & Systems 2024-08-26 Zhuowen Zhao , Xiaoya Chong , Tanny Chavez , Alexander Hexemer

Common evaluation paradigms for language models focus on scoring single responses through accuracy metrics or proper scoring rules, failing to capture the full richness of a model's belief state. Recent work illustrates that language models…

Computation and Language · Computer Science 2025-10-07 Thomas F Burns

Contemporary Text-to-Image (T2I) models frequently depend on qualitative human evaluations to assess the consistency between synthesized images and the text prompts. There is a demand for quantitative and automatic evaluation tools, given…

Computer Vision and Pattern Recognition · Computer Science 2024-12-10 Ziyuan Qin , Dongjie Cheng , Haoyu Wang , Huahui Yi , Yuting Shao , Zhiyuan Fan , Kang Li , Qicheng Lao

Despite their impressive ability to generate high-quality and fluent text, generative large language models (LLMs) also produce hallucinations: statements that are misaligned with established world knowledge or provided input context.…

Computation and Language · Computer Science 2025-01-15 Abhilasha Ravichander , Shrusti Ghela , David Wadden , Yejin Choi

Denoising Probabilistic Models (DPMs) represent an emerging domain of generative models that excel in generating diverse and high-quality images. However, most current training methods for DPMs often neglect the correlation between…

Computer Vision and Pattern Recognition · Computer Science 2024-02-01 Viet Nguyen , Giang Vu , Tung Nguyen Thanh , Khoat Than , Toan Tran