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Large Vision-Language Models (LVLMs) have achieved impressive performance in multimodal tasks, but they still suffer from hallucinations, i.e., generating content that is grammatically accurate but inconsistent with visual inputs. In this…

计算机视觉与模式识别 · 计算机科学 2026-03-09 Chenxi Li , Yichen Guo , Benfang Qian , Jinhao You , Kai Tang , Yaosong Du , Zonghao Zhang , Xiande Huang

Large Language Models (LLMs) have achieved remarkable success with their billion-level parameters, yet they incur high inference overheads. The emergence of activation sparsity in LLMs provides a natural approach to reduce this cost by…

计算与语言 · 计算机科学 2024-12-13 Haizhong Zheng , Xiaoyan Bai , Xueshen Liu , Z. Morley Mao , Beidi Chen , Fan Lai , Atul Prakash

Large Vision-Language Models (LVLMs) can reason effectively over both textual and visual inputs, but they tend to hallucinate syntactically coherent yet visually ungrounded contents. In this paper, we investigate the internal dynamics of…

计算机视觉与模式识别 · 计算机科学 2025-07-02 Zhuowei Li , Haizhou Shi , Yunhe Gao , Di Liu , Zhenting Wang , Yuxiao Chen , Ting Liu , Long Zhao , Hao Wang , Dimitris N. Metaxas

Recent work on activation and latent steering has demonstrated that modifying internal representations can effectively guide large language models (LLMs) toward improved reasoning and efficiency without additional training. However, most…

机器学习 · 计算机科学 2026-01-07 Tuc Nguyen , Thai Le

Although large Language Models (LLMs) have achieved remarkable success, their practical application is often hindered by the generation of non-factual content, which is called "hallucination". Ensuring the reliability of LLMs' outputs is a…

计算与语言 · 计算机科学 2025-09-16 Yue Ding , Xiaofang Zhu , Tianze Xia , Junfei Wu , Xinlong Chen , Qiang Liu , Liang Wang

Machine Translation (MT) is undergoing a paradigm shift, with systems based on fine-tuned large language models (LLM) becoming increasingly competitive with traditional encoder-decoder models trained specifically for translation tasks.…

计算与语言 · 计算机科学 2025-01-30 Zilu Tang , Rajen Chatterjee , Sarthak Garg

While Large Vision-Language Models (LVLMs) have rapidly advanced in recent years, the prevalent issue known as the `hallucination' problem has emerged as a significant bottleneck, hindering their real-world deployments. Existing methods…

计算机视觉与模式识别 · 计算机科学 2025-03-18 Fushuo Huo , Wenchao Xu , Zhong Zhang , Haozhao Wang , Zhicheng Chen , Peilin Zhao

The hallucination problem in multimodal large language models (MLLMs) remains a common issue. Although image tokens occupy a majority of the input sequence of MLLMs, there is limited research to explore the relationship between image tokens…

计算机视觉与模式识别 · 计算机科学 2024-11-18 Xiaofeng Zhang , Yihao Quan , Chaochen Gu , Chen Shen , Xiaosong Yuan , Shaotian Yan , Hao Cheng , Kaijie Wu , Jieping Ye

Vision-Language Models (VLMs) often hallucinate objects that are not present in the input image. We identify a contributing cause of this behavior, which we term spatial credit collapse: in early transformer layers, hidden-state activation…

计算机视觉与模式识别 · 计算机科学 2026-03-05 Niamul Hassan Samin , Md Arifur Rahman , Abdullah Ibne Hanif Arean , Juena Ahmed Noshin , Md Ashikur Rahman

Hallucinations in LLMs present a critical barrier to their reliable usage. Existing research usually categorizes hallucination by their external properties rather than by the LLMs' underlying internal properties. This external focus…

Large Vision-Language Models (LVLMs) integrate image encoders with Large Language Models (LLMs) to process multi-modal inputs and perform complex visual tasks. However, they often generate hallucinations by describing non-existent objects…

计算机视觉与模式识别 · 计算机科学 2025-02-25 Yaqi Sun , Kyohei Atarashi , Koh Takeuchi , Hisashi Kashima

Large Language Models (LLMs), while demonstrating remarkable capabilities across various applications, present significant challenges during inference due to their substantial model size, especially when deployed on edge devices. Activation…

机器学习 · 计算机科学 2025-04-29 Zhenyu Zhang , Zechun Liu , Yuandong Tian , Harshit Khaitan , Zhangyang Wang , Steven Li

LLMs have demonstrated unprecedented capabilities in natural language processing, yet their practical deployment remains hindered by persistent factuality and faithfulness hallucinations. While existing methods address these hallucination…

计算与语言 · 计算机科学 2025-11-25 Pengbo Wang , Chaozhuo Li , Chenxu Wang , Liwen Zheng , Litian Zhang , Xi Zhang

Hallucination remains a fundamental challenge in vision-language models (VLMs), where autoregressive generation may produce linguistically plausible yet physically inconsistent or visually ungrounded responses due to likelihood maximization…

计算机视觉与模式识别 · 计算机科学 2026-05-19 Qinwu Xu

The increase in computing power and the necessity of AI-assisted decision-making boost the growing application of large language models (LLMs). Along with this, the potential retention of sensitive data of LLMs has spurred increasing…

计算与语言 · 计算机科学 2026-04-20 Chenchen Tan , Youyang Qu , Xinghao Li , Hui Zhang , Shujie Cui , Cunjian Chen , Longxiang Gao

Hallucination has been a long-standing and inevitable problem that hinders the application of Large Vision-Language Models (LVLMs) in domains that require high reliability. Various methods focus on improvement depending on data annotations…

计算机视觉与模式识别 · 计算机科学 2025-02-04 Chao Wang , Jianming Yang , Yang Zhou

Sparsity is a desirable attribute. It can lead to more efficient and more effective representations compared to the dense model. Meanwhile, learning sparse latent representations has been a challenging problem in the field of computer…

计算机视觉与模式识别 · 计算机科学 2022-09-22 Hanao Li , Tian Han

Large Language Models (LLMs) are increasingly deployed in safety-critical domains, yet remain susceptible to hallucinations. While prior works have proposed confidence representation methods for hallucination detection, most of these…

机器学习 · 计算机科学 2025-11-17 Elyes Hajji , Aymen Bouguerra , Fabio Arnez

Hallucination in large language models (LLMs) continues to be a significant issue, particularly in tasks like question answering, where models often generate plausible yet incorrect or irrelevant information. Although various methods have…

计算与语言 · 计算机科学 2026-04-09 Ziqin Luo , Yihao Quan , Xiaofeng Zhang , Xiaosong Yuan , Chen Shen

Large Language Models have revolutionized information processing, yet their reliability is severely compromised by faithfulness hallucinations. While current approaches attempt to mitigate this issue through node-level adjustments or coarse…

计算与语言 · 计算机科学 2026-01-06 Chenxu Wang , Chaozhuo Li , Pengbo Wang , Litian Zhang , Songyang Liu , Ji Qi , Jiahui Hu , Yushan Cai , Hao Zhao , Rui Pu