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Large Vision-Language Models (LVLMs) have shown promising capabilities in understanding and generating information by integrating both visual and textual data. However, current models are still prone to hallucinations, which degrade the…

计算机视觉与模式识别 · 计算机科学 2025-11-13 Robert Wijaya , Ngoc-Bao Nguyen , Ngai-Man Cheung

Self-improvement in multimodal large language models (MLLMs) is crucial for enhancing their reliability and robustness. However, current methods often rely heavily on MLLMs themselves as judges, leading to high computational costs and…

计算与语言 · 计算机科学 2024-11-28 Shijian Deng , Wentian Zhao , Yu-Jhe Li , Kun Wan , Daniel Miranda , Ajinkya Kale , Yapeng Tian

Pre-trained vision-language models like CLIP have remarkably adapted to various downstream tasks. Nonetheless, their performance heavily depends on the specificity of the input text prompts, which requires skillful prompt template…

机器学习 · 计算机科学 2024-10-22 Yingjun Du , Wenfang Sun , Cees G. M. Snoek

Though reasoning abilities are considered language-agnostic, existing LLMs exhibit inconsistent reasoning abilities across different languages, e.g., reasoning in the dominant language like English is superior to other languages due to the…

计算与语言 · 计算机科学 2024-04-16 Shuaijie She , Wei Zou , Shujian Huang , Wenhao Zhu , Xiang Liu , Xiang Geng , Jiajun Chen

Multi-Objective Alignment aims to align Large Language Models (LLMs) with diverse and often conflicting human values by optimizing multiple objectives simultaneously. Existing methods predominantly rely on static preference weight…

机器学习 · 计算机科学 2026-04-28 Wenzhe Xu , Biao Liu , Yiyang Sun , Xin Geng , Ning Xu

Direct alignment methods are increasingly used for aligning large language models (LLMs) with human preferences. However, these methods suffer from the issues of verbosity and likelihood displacement, which can be driven by the noisy…

计算与语言 · 计算机科学 2025-10-28 Peter Chen , Xi Chen , Wotao Yin , Tianyi Lin

Large Language Model (LLM) training often optimizes for preference alignment, rewarding outputs that are perceived as helpful and interaction-friendly. However, this preference-oriented objective can be exploited: manipulative prompts can…

密码学与安全 · 计算机科学 2026-01-13 Hongjun An , Yiliang Song , Jiangan Chen , Jiawei Shao , Chi Zhang , Xuelong Li

Large vision-language models (LVLMs) remain vulnerable to hallucination, often generating content misaligned with visual inputs. Although recent training-based approaches aim to mitigate hallucination, they typically rely on predefined or…

计算机视觉与模式识别 · 计算机科学 2025-09-30 Shujun Liu , Siyuan Wang , Zejun Li , Jianxiang Wang , Cheng Zeng , Zhongyu Wei

Preference alignment in Large Language Models (LLMs) has significantly improved their ability to adhere to human instructions and intentions. However, existing direct alignment algorithms primarily focus on relative preferences and often…

机器学习 · 计算机科学 2025-05-13 Shenao Zhang , Zhihan Liu , Boyi Liu , Yufeng Zhang , Yingxiang Yang , Yongfei Liu , Liyu Chen , Tao Sun , Zhaoran Wang

Object hallucination remains a primary obstacle to the reliable deployment of Multimodal Large Language Models (MLLMs). Current inference-time mitigation methods mainly assume hallucinations stem from visual neglect, steering models to…

计算与语言 · 计算机科学 2026-05-28 Jingwen Wu , Xijun Zhang , Ge Song

Multimodal large language models (MLLMs) have revolutionized the landscape of AI, demonstrating impressive capabilities in tackling complex vision and audio-language tasks. However, a critical challenge remains: these models often suffer…

机器学习 · 计算机科学 2026-05-05 Itai Allouche , Joseph Keshet

Multimodal Large Language Models (MLLMs) still struggle with hallucinations despite their impressive capabilities. Recent studies have attempted to mitigate this by applying Direct Preference Optimization (DPO) to multimodal scenarios using…

计算与语言 · 计算机科学 2025-01-29 Jinlan Fu , Shenzhen Huangfu , Hao Fei , Xiaoyu Shen , Bryan Hooi , Xipeng Qiu , See-Kiong Ng

Recently, large vision-language models (LVLMs) have risen to be a promising approach for multimodal tasks. However, principled hallucination mitigation remains a critical challenge.In this work, we first analyze the data generation process…

计算机视觉与模式识别 · 计算机科学 2025-12-02 Chengzhi Yu , Yifan Xu , Yifan Chen , Wenyi Zhang

Large vision-language models (LVLMs) have demonstrated remarkable multimodal comprehension and reasoning capabilities, but they still suffer from severe object hallucination. Previous studies primarily attribute the flaw to linguistic prior…

计算机视觉与模式识别 · 计算机科学 2025-08-05 Haohan Zheng , Zhenguo Zhang

While astonishingly capable, large Language Models (LLM) can sometimes produce outputs that deviate from human expectations. Such deviations necessitate an alignment phase to prevent disseminating untruthful, toxic, or biased information.…

人工智能 · 计算机科学 2024-10-30 Long Tan Le , Han Shu , Tung-Anh Nguyen , Choong Seon Hong , Nguyen H. Tran

Aligning large language models (LLMs) to diverse human preferences is fundamentally challenging since criteria can often conflict with each other. Inference-time alignment methods have recently gained popularity as they allow LLMs to be…

机器学习 · 统计学 2026-02-03 Shokichi Takakura , Akifumi Wachi , Rei Higuchi , Kohei Miyaguchi , Taiji Suzuki

A common technique for aligning large language models (LLMs) relies on acquiring human preferences by comparing multiple generations conditioned on a fixed context. This method, however, relies solely on pairwise comparisons, where the…

计算与语言 · 计算机科学 2025-01-09 Hritik Bansal , Ashima Suvarna , Gantavya Bhatt , Nanyun Peng , Kai-Wei Chang , Aditya Grover

Inspired by the superior language abilities of large language models (LLM), large vision-language models (LVLM) have been recently explored by integrating powerful LLMs for improving the performance on complex multimodal tasks. Despite the…

计算机视觉与模式识别 · 计算机科学 2023-10-27 Yifan Li , Yifan Du , Kun Zhou , Jinpeng Wang , Wayne Xin Zhao , Ji-Rong Wen

Hallucination remains a major challenge for Large Vision-Language Models (LVLMs). Direct Preference Optimization (DPO) has gained increasing attention as a simple solution to hallucination issues. It directly learns from constructed…

计算机视觉与模式识别 · 计算机科学 2025-03-04 Zhihe Yang , Xufang Luo , Dongqi Han , Yunjian Xu , Dongsheng Li

Multi-modal large language models (MLLMs) are expected to support multi-turn queries of interchanging image and text modalities in production. However, the current MLLMs trained with visual-question-answering (VQA) datasets could suffer…

计算与语言 · 计算机科学 2024-11-06 Shengzhi Li , Rongyu Lin , Shichao Pei