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Pruning vision-language models (VLMs) for efficient deployment is challenging because compression can affect not only task utility but also visual grounding, often amplifying object hallucinations even at the same sparsity level. We present…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Lincen Bai , Hedi Tabia , Raul Santos-Rodriguez

Multimodal Large Language Models (MLLMs) suffer from substantial computational overhead due to the high redundancy in visual token sequences. Existing approaches typically address this issue using single-layer Vision Transformer (ViT)…

Computer Vision and Pattern Recognition · Computer Science 2026-04-15 Yunkai Dang , Yizhu Jiang , Yifan Jiang , Qi Fan , Yinghuan Shi , Wenbin Li , Yang Gao

Vision-Language-Action (VLA) models have shown remarkable promise in robotics manipulation, yet their high computational cost hinders real-time deployment. Existing token pruning methods suffer from a fundamental trade-off: aggressive…

Robotics · Computer Science 2026-05-19 Yixu Feng , Zinan Zhao , Yanxiang Ma , Chenghao Xia , Chengbin Du , Yunke Wang , Chang Xu

The rapid progress of large language models (LLMs) has laid the foundation for multimodal models. However, visual language models (VLMs) still face heavy computational costs when extended from images to videos due to high frame rates and…

Computer Vision and Pattern Recognition · Computer Science 2026-02-10 Peiran Wu , Zhuorui Yu , Yunze Liu , Chi-Hao Wu , Enmin Zhou , Junxiao Shen

Vision-Language Models (VLMs) leverage aligned visual encoders to transform images into visual tokens, allowing them to be processed similarly to text by the backbone large language model (LLM). This unified input paradigm enables VLMs to…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Bangzheng Li , Fei Wang , Wenxuan Zhou , Nan Xu , Ben Zhou , Sheng Zhang , Hoifung Poon , Muhao Chen

Vision-language models (VLMs) typically encode substantially more visual tokens than text tokens, resulting in significant token redundancy. Pruning uninformative visual tokens is therefore crucial for improving computational efficiency,…

Computer Vision and Pattern Recognition · Computer Science 2026-01-19 Kai Zhao , Wubang Yuan , Yuchen Lin , Liting Ruan , Xiaofeng Lu , Deng-Ping Fan , Ming-Ming Cheng , Dan Zeng

The application of Large Vision-Language Models (LVLMs) for analyzing images and videos is an exciting and rapidly evolving field. In recent years, we've seen significant growth in high-quality image-text datasets for fine-tuning image…

Computer Vision and Pattern Recognition · Computer Science 2024-12-13 Han Wang , Yuxiang Nie , Yongjie Ye , Deng GuanYu , Yanjie Wang , Shuai Li , Haiyang Yu , Jinghui Lu , Can Huang

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

While excellent in transfer learning, Vision-Language models (VLMs) come with high computational costs due to their large number of parameters. To address this issue, removing parameters via model pruning is a viable solution. However,…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Matteo Farina , Massimiliano Mancini , Elia Cunegatti , Gaowen Liu , Giovanni Iacca , Elisa Ricci

We introduce PRANCE, a Vision Transformer compression framework that jointly optimizes the activated channels and reduces tokens, based on the characteristics of inputs. Specifically, PRANCE~ leverages adaptive token optimization strategies…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Ye Li , Chen Tang , Yuan Meng , Jiajun Fan , Zenghao Chai , Xinzhu Ma , Zhi Wang , Wenwu Zhu

Prevailing Multimodal Large Language Models (MLLMs) encode the input image(s) as vision tokens and feed them into the language backbone, similar to how Large Language Models (LLMs) process the text tokens. However, the number of vision…

Computer Vision and Pattern Recognition · Computer Science 2024-12-10 Shiyu Zhao , Zhenting Wang , Felix Juefei-Xu , Xide Xia , Miao Liu , Xiaofang Wang , Mingfu Liang , Ning Zhang , Dimitris N. Metaxas , Licheng Yu

Conventional Vision-Language Models(VLMs) typically utilize a fixed number of vision tokens, regardless of task complexity. This one-size-fits-all strategy introduces notable inefficiencies: using excessive tokens leads to unnecessary…

Computer Vision and Pattern Recognition · Computer Science 2025-04-07 Junshan Hu , Jialiang Mao , Zhikang Liu , Zhongpu Xia , Peng Jia , Xianpeng Lang

Vision-Language Models (VLMs) demonstrate impressive performance in understanding visual content with language instruction by converting visual inputs to vision tokens. However, redundancy in vision tokens results in the degraded inference…

Computer Vision and Pattern Recognition · Computer Science 2026-03-04 Sixun Dong , Juhua Hu , Mian Zhang , Ming Yin , Yanjie Fu , Qi Qian

We present LightVLA, a simple yet effective differentiable token pruning framework for vision-language-action (VLA) models. While VLA models have shown impressive capability in executing real-world robotic tasks, their deployment on…

Robotics · Computer Science 2025-09-23 Titong Jiang , Xuefeng Jiang , Yuan Ma , Xin Wen , Bailin Li , Kun Zhan , Peng Jia , Yahui Liu , Sheng Sun , Xianpeng Lang

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

Multimodal Large Language Models (MLLMs) encounter significant computational and memory bottlenecks from the massive number of visual tokens generated by high-resolution images or multi-image inputs. Previous token compression techniques…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 Jiaying Zhu , Yurui Zhu , Xin Lu , Wenrui Yan , Dong Li , Kunlin Liu , Xueyang Fu , Zheng-Jun Zha

This paper investigates how to efficiently deploy vision transformers on edge devices for small workloads. Recent methods reduce the latency of transformer neural networks by removing or merging tokens, with small accuracy degradation.…

Machine Learning · Computer Science 2024-11-12 Nick John Eliopoulos , Purvish Jajal , James C. Davis , Gaowen Liu , George K. Thiravathukal , Yung-Hsiang Lu

Recent advances have explored visual token pruning to accelerate the inference of large vision-language models (LVLMs). However, existing methods often struggle to balance token importance and diversity: importance-based methods tend to…

Computer Vision and Pattern Recognition · Computer Science 2026-04-08 Zhaohong Huang , Wenjing Liu , Yuxin Zhang , Fei Chao , Rongrong Ji

Existing visual token compression methods for Multimodal Large Language Models (MLLMs) predominantly operate as post-encoder modules, limiting their potential for efficiency gains. To address this limitation, we propose LaCo (Layer-wise…

Computer Vision and Pattern Recognition · Computer Science 2025-07-04 Juntao Liu , Liqiang Niu , Wenchao Chen , Jie Zhou , Fandong Meng

Visual Place Recognition (VPR) aims to match a query image to reference images of the same place in a large-scale database. Recent state-of-the-art methods employ Vision Transformers (ViTs) as backbone foundation models to extract…

Computer Vision and Pattern Recognition · Computer Science 2026-05-21 Zichao Zeng , June Moh Goo , Junwei Zheng , Weijia Fan , Jiaming Zhang , Rainer Stiefelhagen , Jan Boehm