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Despite impressive progress in capabilities of large vision-language models (LVLMs), these systems remain vulnerable to hallucinations, i.e., outputs that are not grounded in the visual input. Prior work has attributed hallucinations in…

Computer Vision and Pattern Recognition · Computer Science 2026-04-24 Pegah Khayatan , Jayneel Parekh , Arnaud Dapogny , Mustafa Shukor , Alasdair Newson , Matthieu Cord

Aligning large vision-language models (LVLMs) with human preferences is challenging due to the scarcity of fine-grained, high-quality, and multimodal preference data without human annotations. Existing methods relying on direct distillation…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Muzhi Dai , Jiashuo Sun , Zhiyuan Zhao , Shixuan Liu , Rui Li , Junyu Gao , Xuelong Li

Improving large language model (LLM) reasoning requires supervision that is both aligned with the model's own test-time states and informative at the token level. Reinforcement learning with verifiable rewards provides on-policy exploration…

Machine Learning · Computer Science 2026-04-30 Zhiquan Tan , Yinrong Hong

Speculative decoding is a powerful way to accelerate autoregressive large language models (LLMs), but directly porting it to vision-language models (VLMs) faces unique systems constraints: the prefill stage is dominated by visual tokens…

Computer Vision and Pattern Recognition · Computer Science 2025-09-23 Haiduo Huang , Fuwei Yang , Zhenhua Liu , Xuanwu Yin , Dong Li , Pengju Ren , Emad Barsoum

We introduce LLaVA-MoD, a novel framework designed to enable the efficient training of small-scale Multimodal Language Models (s-MLLM) by distilling knowledge from large-scale MLLM (l-MLLM). Our approach tackles two fundamental challenges…

Computer Vision and Pattern Recognition · Computer Science 2024-10-24 Fangxun Shu , Yue Liao , Le Zhuo , Chenning Xu , Lei Zhang , Guanghao Zhang , Haonan Shi , Long Chen , Tao Zhong , Wanggui He , Siming Fu , Haoyuan Li , Bolin Li , Zhelun Yu , Si Liu , Hongsheng Li , Hao Jiang

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.…

Computation and Language · Computer Science 2025-01-30 Zilu Tang , Rajen Chatterjee , Sarthak Garg

Using effective generalization capabilities of vision language models (VLMs) in context-specific dynamic tasks for embodied artificial intelligence remains a significant challenge. Although supervised fine-tuned models can better align with…

Artificial Intelligence · Computer Science 2025-09-11 Kechen Jiao , Zhirui Fang , Jiahao Liu , Bei Li , Qifan Wang , Xinyu Liu , Junhao Ruan , Zhongjian Qiao , Yifan Zhu , Yaxin Xu , Jingang Wang , Xiu Li

We aim to produce a smaller language model that is aligned to user intent. Previous research has shown that applying distilled supervised fine-tuning (dSFT) on larger models significantly improves task accuracy; however, these models are…

Medical Large Vision-Language Models (Med-LVLMs) have shown promising results in clinical applications, but often suffer from hallucinated outputs due to misaligned visual understanding. In this work, we identify two fundamental limitations…

Computer Vision and Pattern Recognition · Computer Science 2025-12-23 Aofei Chang , Ting Wang , Fenglong Ma

Multimodal Large Language Models (MLLMs) still struggle with fine-grained visual understanding, where answers often depend on small but decisive evidence in the full image. We observe a regional-to-global perception gap: the same MLLM…

Computer Vision and Pattern Recognition · Computer Science 2026-05-28 Qianhao Yuan , Jie Lou , Xing Yu , Hongyu Lin , Le Sun , Xianpei Han , Yaojie Lu

Preference-based reinforcement learning (RL) offers a promising approach for aligning policies with human intent but is often constrained by the high cost of human feedback. In this work, we introduce PrefVLM, a framework that integrates…

Machine Learning · Computer Science 2025-02-04 Udita Ghosh , Dripta S. Raychaudhuri , Jiachen Li , Konstantinos Karydis , Amit Roy-Chowdhury

Visual preference alignment involves training Large Vision-Language Models (LVLMs) to predict human preferences between visual inputs. This is typically achieved by using labeled datasets of chosen/rejected pairs and employing optimization…

Computer Vision and Pattern Recognition · Computer Science 2024-10-24 Ziyu Liu , Yuhang Zang , Xiaoyi Dong , Pan Zhang , Yuhang Cao , Haodong Duan , Conghui He , Yuanjun Xiong , Dahua Lin , Jiaqi Wang

Vision and language models frequently ignore semantically critical input edits, defaulting to pretraining priors. For example, models will confidently assert a five-legged dog has four legs; consequently, on the VLMBias benchmark, GPT 5.2…

Computation and Language · Computer Science 2026-05-12 Yijin Ni , Simon Yu , Peng Qi

Dataset distillation methods reduce large-scale datasets to smaller sets of synthetic data, preserving sufficient information to quickly train a new model from scratch. However, prior work on dataset distillation has focused exclusively on…

Computer Vision and Pattern Recognition · Computer Science 2024-08-21 Xindi Wu , Byron Zhang , Zhiwei Deng , Olga Russakovsky

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…

Computation and Language · Computer Science 2025-01-29 Jinlan Fu , Shenzhen Huangfu , Hao Fei , Xiaoyu Shen , Bryan Hooi , Xipeng Qiu , See-Kiong Ng

Vision-language models (VLMs) are prone to hallucinations that critically compromise reliability in medical applications. While preference optimization can mitigate these hallucinations through clinical feedback, its implementation faces…

Computer Vision and Pattern Recognition · Computer Science 2025-07-10 Xiao Liang , Jiawei Hu , Di Wang , Zhi Ma , Lin Zhao , Ronghan Li , Bo Wan , Quan Wang

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…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Shujun Liu , Siyuan Wang , Zejun Li , Jianxiang Wang , Cheng Zeng , Zhongyu Wei

Preference finetuning methods like Direct Preference Optimization (DPO) with AI-generated feedback have shown promise in aligning Large Vision-Language Models (LVLMs) with human preferences. However, existing techniques overlook the…

Artificial Intelligence · Computer Science 2025-10-03 Rohan Wadhawan , Fabrice Y Harel-Canada , Zi-Yi Dou , Suhaila Shakiah , Robinson Piramuthu , Nanyun Peng

Stated preference (SP) surveys are a key method to research how individuals make trade-offs in hypothetical, also futuristic, scenarios. In energy context this includes key decarbonisation enablement contexts, such as low-carbon…

Computation and Language · Computer Science 2025-08-25 Han Wang , Jacek Pawlak , Aruna Sivakumar

The development of large vision-language models (LVLMs) offers the potential to address challenges faced by traditional multimodal recommendations thanks to their proficient understanding of static images and textual dynamics. However, the…

Artificial Intelligence · Computer Science 2024-02-14 Yuqing Liu , Yu Wang , Lichao Sun , Philip S. Yu