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Vision-Language Models (VLMs) frequently suffer from visual perception errors and hallucinations that compromise answer accuracy in complex reasoning tasks. Reinforcement Learning with Verifiable Rewards (RLVR) offers a promising solution…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Yin Zhang , Jiaxuan Zhao , Zonghan Wu , Zengxiang Li , Junfeng Fang , Kun Wang , Qingsong Wen , Yilei Shao

We propose a large language model based reward decomposition framework for aligning dialogue agents using only a single session-level feedback signal. We leverage the reasoning capabilities of a frozen, pretrained large language model (LLM)…

Computation and Language · Computer Science 2026-02-12 Dong Won Lee , Hae Won Park , Cynthia Breazeal , Louis-Philippe Morency

While Reinforcement Learning from Human Feedback (RLHF) significantly enhances the generation quality of Large Language Models (LLMs), recent studies have raised concerns regarding the complexity and instability associated with the Proximal…

Computation and Language · Computer Science 2024-02-27 Xin Mao , Feng-Lin Li , Huimin Xu , Wei Zhang , Anh Tuan Luu

Despite their impressive performance across a wide range of tasks, Large Vision-Language Models (LVLMs) remain prone to hallucination. In this study, we propose a comprehensive intervention framework aligned with the transformer's causal…

Computer Vision and Pattern Recognition · Computer Science 2026-01-07 Jiaye Qian , Ge Zheng , Yuchen Zhu , Sibei Yang

As Large Language Models (LLMs) continue to progress toward more advanced forms of intelligence, Reinforcement Learning from Human Feedback (RLHF) is increasingly seen as a key pathway toward achieving Artificial General Intelligence (AGI).…

Machine Learning · Computer Science 2024-10-17 Yuzi Yan , Xingzhou Lou , Jialian Li , Yiping Zhang , Jian Xie , Chao Yu , Yu Wang , Dong Yan , Yuan Shen

Despite the impressive advancements of Large Vision-Language Models (LVLMs), existing approaches suffer from a fundamental bottleneck: inefficient visual-language integration. Current methods either disrupt the model's inherent structure or…

Computer Vision and Pattern Recognition · Computer Science 2025-06-23 Tongtian Yue , Longteng Guo , Yepeng Tang , Zijia Zhao , Xinxin Zhu , Hua Huang , Jing Liu

Language Models (LMs) have shown impressive performance in various natural language tasks. However, when it comes to natural language reasoning, LMs still face challenges such as hallucination, generating incorrect intermediate reasoning…

Computation and Language · Computer Science 2023-10-20 Deepak Nathani , David Wang , Liangming Pan , William Yang Wang

Large Vision-Language Models (LVLMs) recently achieve significant breakthroughs in understanding complex visual-textual contexts. However, hallucination issues still limit their real-world applicability. Although previous mitigation methods…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Zhaoxu Li , Chenqi Kong , Yi Yu , Qiangqiang Wu , Xinghao Jiang , Ngai-Man Cheung , Bihan Wen , Alex Kot , Xudong Jiang

The hallucination of large multimodal models (LMMs), providing responses that appear correct but are actually incorrect, limits their reliability and applicability. This paper aims to study the hallucination problem of LMMs in video…

Computer Vision and Pattern Recognition · Computer Science 2025-03-26 Hongcheng Gao , Jiashu Qu , Jingyi Tang , Baolong Bi , Yue Liu , Hongyu Chen , Li Liang , Li Su , Qingming Huang

Multimodal Large Language Models (MLLMs) have emerged as a central focus in both industry and academia, but often suffer from biases introduced by visual and language priors, which can lead to multimodal hallucination. These biases arise…

Computer Vision and Pattern Recognition · Computer Science 2025-02-19 Guanyu Zhou , Yibo Yan , Xin Zou , Kun Wang , Aiwei Liu , Xuming Hu

Reward engineering has long been a challenge in Reinforcement Learning (RL) research, as it often requires extensive human effort and iterative processes of trial-and-error to design effective reward functions. In this paper, we propose…

Robotics · Computer Science 2024-06-18 Yufei Wang , Zhanyi Sun , Jesse Zhang , Zhou Xian , Erdem Biyik , David Held , Zackory Erickson

Large language models are known to hallucinate when faced with unfamiliar queries, but the underlying mechanism that govern how models hallucinate are not yet fully understood. In this work, we find that unfamiliar examples in the models'…

Machine Learning · Computer Science 2024-05-30 Katie Kang , Eric Wallace , Claire Tomlin , Aviral Kumar , Sergey Levine

Large Vision Language Models (LVLMs) have demonstrated remarkable capabilities in understanding and describing visual content, achieving state-of-the-art performance across various vision-language tasks. However, these models often generate…

Computer Vision and Pattern Recognition · Computer Science 2025-03-27 Kazi Hasan Ibn Arif , Sajib Acharjee Dip , Khizar Hussain , Lang Zhang , Chris Thomas

Large Language Models (LLMs) fine-tuned via Reinforcement Learning from Human Feedback (RLHF) and Reinforcement Learning with Verifiable Rewards (RLVR) significantly improve the alignment of human-AI values, further raising the upper bound…

Artificial Intelligence · Computer Science 2025-10-10 Jian Hu , Xibin Wu , Wei Shen , Jason Klein Liu , Zilin Zhu , Weixun Wang , Songlin Jiang , Haoran Wang , Hao Chen , Bin Chen , Weikai Fang , Xianyu , Yu Cao , Haotian Xu , Yiming Liu

Reinforcement Learning from AI Feedback (RLAIF) has demonstrated significant potential across various domains, including mitigating harm in LLM outputs, enhancing text summarization, and mathematical reasoning. This paper introduces an…

Computation and Language · Computer Science 2024-07-01 Sujan Dutta , Sayantan Mahinder , Raviteja Anantha , Bortik Bandyopadhyay

Hallucination in large language models (LLMs) has been widely studied in recent years, with progress in both detection and mitigation aimed at improving truthfulness. Yet, a critical side effect remains largely overlooked: enhancing…

Computation and Language · Computer Science 2026-02-02 Omar Mahmoud , Ali Khalil , Buddhika Laknath Semage , Thommen George Karimpanal , Santu Rana

Recently, Large Vision-Language Models (LVLMs) have demonstrated impressive capabilities in multi-modal context comprehension. However, they still suffer from hallucination problems referring to generating inconsistent outputs with the…

Computer Vision and Pattern Recognition · Computer Science 2024-09-02 Xiaoye Qu , Jiashuo Sun , Wei Wei , Yu Cheng

Large Language Models (LLMs) and Vision-Language Large Models (LVLMs) have achieved remarkable progress in natural language processing and multimodal understanding. Despite their impressive generalization capabilities, current LVLMs often…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Leilei Guo , Antonio Carlos Rivera , Peiyu Tang , Haoxuan Ren , Zheyu Song

Although Large Vision-Language Models (LVLMs) have made substantial progress, hallucination, where generated text is not grounded in the visual input, remains a challenge. As LVLMs become stronger, previously reported hallucination…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 April Fu

While Multimodal Large Language Models (MLLMs) have achieved remarkable progress in open-ended visual question answering, they remain vulnerable to hallucinations. These are outputs that contradict or misrepresent input semantics, posing a…

Computer Vision and Pattern Recognition · Computer Science 2025-10-01 Jianjiang Yang , Yanshu li , Ziyan Huang