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Vision-Language Models (VLMs) are powerful tools for processing and understanding text and images. We study the processing of visual tokens in the language model component of LLaVA, a prominent VLM. Our approach focuses on analyzing the…

Computer Vision and Pattern Recognition · Computer Science 2025-04-29 Clement Neo , Luke Ong , Philip Torr , Mor Geva , David Krueger , Fazl Barez

In this study, we identify the inefficient attention phenomena in Large Vision-Language Models (LVLMs), notably within prominent models like LLaVA-1.5, QwenVL-Chat and Video-LLaVA. We find out that the attention computation over visual…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Liang Chen , Haozhe Zhao , Tianyu Liu , Shuai Bai , Junyang Lin , Chang Zhou , Baobao Chang

In this work, we reveal the limitations of visual tokenizers and VAEs in preserving fine-grained features, and propose a benchmark to evaluate reconstruction performance for two challenging visual contents: text and face. Visual tokenizers…

Computer Vision and Pattern Recognition · Computer Science 2025-05-27 Junfeng Wu , Dongliang Luo , Weizhi Zhao , Zhihao Xie , Yuanhao Wang , Junyi Li , Xudong Xie , Yuliang Liu , Xiang Bai

The practical application of Multimodal Large Language Models (MLLMs) to Video Question Answering (Video-QA) is severely hindered by the high token cost of processing numerous video frames. While keyframe selection is the dominant strategy…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Shaoguang Wang , Weiyu Guo , Ziyang Chen , Yijie Xu , Xuming Hu , Hui Xiong

Visual token pruning aims to compress and prune redundant visual tokens which play a critical role in efficient inference with large vision-language models (LVLMs). However, most existing work estimates visual redundancy using a single…

Computer Vision and Pattern Recognition · Computer Science 2025-11-20 Duo Li , Zuhao Yang , Xiaoqin Zhang , Ling Shao , Shijian Lu

Multi-modal Large Langue Models (MLLMs) often process thousands of visual tokens, which consume a significant portion of the context window and impose a substantial computational burden. Prior work has empirically explored visual token…

Computer Vision and Pattern Recognition · Computer Science 2025-03-27 Dingchen Yang , Bowen Cao , Anran Zhang , Weibo Gu , Winston Hu , Guang Chen

Large Multimodal Models (LMMs) excel in visual-language tasks by leveraging numerous visual tokens for fine-grained visual information, but this token redundancy results in significant computational costs. Previous research aimed at…

Computer Vision and Pattern Recognition · Computer Science 2025-09-12 Sihan Yang , Runsen Xu , Chenhang Cui , Tai Wang , Dahua Lin , Jiangmiao Pang

Vision Transformers (ViTs) have emerged as the backbone of many segmentation models, consistently achieving state-of-the-art (SOTA) performance. However, their success comes at a significant computational cost. Image token pruning is one of…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Hanning Chen , Yang Ni , Wenjun Huang , Yezi Liu , SungHeon Jeong , Fei Wen , Nathaniel Bastian , Hugo Latapie , Mohsen Imani

Recent advancements in vision-language models have enhanced performance by increasing the length of visual tokens, making them much longer than text tokens and significantly raising computational costs. However, we observe that the visual…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Senqiao Yang , Yukang Chen , Zhuotao Tian , Chengyao Wang , Jingyao Li , Bei Yu , Jiaya Jia

Large Vision Language Models (LVLMs) have achieved significant success across multi-modal tasks. However, the computational cost of processing long visual tokens can be prohibitively expensive on resource-limited devices. Previous methods…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Xubing Ye , Yukang Gan , Yixiao Ge , Xiao-Ping Zhang , Yansong Tang

Large Vision-Language Models (LVLMs) incur high computational costs due to significant redundancy in their visual tokens. To effectively reduce this cost, researchers have proposed various visual token pruning methods. However, existing…

Computer Vision and Pattern Recognition · Computer Science 2026-01-27 Wen Luo , Peng Chen , Xiaotao Huang , LiQun Huang

Large Vision-Language Models (LVLMs) excel in visual understanding and reasoning, but the excessive visual tokens lead to high inference costs. Although recent token reduction methods mitigate this issue, they mainly target single-turn…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Yi Wang , Haofei Zhang , Qihan Huang , Anda Cao , Gongfan Fang , Wei Wang , Xuan Jin , Jie Song , Mingli Song , Xinchao Wang

To effectively reduce the visual tokens in Visual Large Language Models (VLLMs), we propose a novel approach called Window Token Concatenation (WiCo). Specifically, we employ a sliding window to concatenate spatially adjacent visual tokens.…

Computer Vision and Pattern Recognition · Computer Science 2025-04-08 Yifan Li , Wentao Bao , Botao Ye , Zhen Tan , Tianlong Chen , Huan Liu , Yu Kong

Vision-language models (VLMs) have achieved impressive performance on multimodal reasoning tasks such as visual question answering, image captioning and so on, but their inference cost remains a significant challenge due to the large number…

Computer Vision and Pattern Recognition · Computer Science 2026-01-06 Weichen Zhang , Zhui Zhu , Ningbo Li , Shilong Tao , Kebin Liu , Yunhao Liu

Vision transformers are ever larger, more accurate, and more expensive to compute. The expense is even more extreme at high resolution as the number of tokens grows quadratically with the image size. We turn to adaptive computation to cope…

Computer Vision and Pattern Recognition · Computer Science 2026-02-06 Anthony Fuller , Yousef Yassin , Junfeng Wen , Daniel G. Kyrollos , Tarek Ibrahim , James R. Green , Evan Shelhamer

Visual token pruning is a promising approach for reducing the computational cost of vision-language models (VLMs), and existing methods often rely on early pruning decisions to improve efficiency. While effective on coarse-grained reasoning…

Computer Vision and Pattern Recognition · Computer Science 2026-02-04 Chen Qian , Xinran Yu , Danyang Li , Guoxuan Chi , Zheng Yang , Qiang Ma , Xin Miao

Large Vision-Language Models (LVLMs) encode visual inputs as dense sequences of patch-level tokens to capture fine-grained semantics. These visual tokens often outnumber their textual counterparts by a large margin, leading to substantial…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 Rui Xu , Yunke Wang , Yong Luo , Bo Du

Visual tokens dominate inference cost in vision-language models (VLMs), yet many carry redundant information. Existing pruning methods alleviate this but typically rely on attention magnitude or similarity scores. We reformulate visual…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Landi He , Xiaoyu Yang , Lijian Xu

Despite achieving remarkable performance on various vision-language tasks, Transformer-based Vision-Language Models (VLMs) suffer from redundancy in inputs and parameters, significantly hampering their efficiency in real-world applications.…

Computation and Language · Computer Science 2024-02-27 Zekun Wang , Jingchang Chen , Wangchunshu Zhou , Haichao Zhu , Jiafeng Liang , Liping Shan , Ming Liu , Dongliang Xu , Qing Yang , Bing Qin

Vision Large Language Models (VLLMs) incur high computational costs due to their reliance on hundreds of visual tokens to represent images. While token pruning offers a promising solution for accelerating inference, this paper, however,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Yahong Wang , Juncheng Wu , Zhangkai Ni , Longzhen Yang , Yihang Liu , Chengmei Yang , Ying Wen , Lianghua He , Xianfeng Tang , Hui Liu , Yuyin Zhou