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Long-form video understanding poses a significant challenge for video large language models (VideoLLMs) due to prohibitively high computational and memory demands. In this paper, we propose FlexSelect, a flexible and efficient token…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 Yunzhu Zhang , Yu Lu , Tianyi Wang , Fengyun Rao , Yi Yang , Linchao Zhu

Large Language Models (LLMs) have been widely adopted to process long-context tasks. However, the large memory overhead of the key-value (KV) cache poses significant challenges in long-context scenarios. Existing training-free KV cache…

Machine Learning · Computer Science 2024-10-22 Luning Wang , Shiyao Li , Xuefei Ning , Zhihang Yuan , Shengen Yan , Guohao Dai , Yu Wang

In the context of long-term video understanding with large multimodal models, many frameworks have been proposed. Although transformer-based visual compressors and memory-augmented approaches are often used to process long videos, they…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Sosuke Yamao , Natsuki Miyahara , Yuankai Qi , Shun Takeuchi

Various studies that address the compressed sensing problem with Multiple Measurement Vectors (MMVs) have been recently carried. These studies assume the vectors of the different channels to be jointly sparse. In this paper, we relax this…

Machine Learning · Computer Science 2016-11-14 Hamid Palangi , Rabab Ward , Li Deng

Video captioning is a challenging task that captures different visual parts and describes them in sentences, for it requires visual and linguistic coherence. The attention mechanism in the current video captioning method learns to assign…

Computer Vision and Pattern Recognition · Computer Science 2021-10-19 Zhixin Sun , Xian Zhong , Shuqin Chen , Lin Li , Luo Zhong

The visual projector serves as an essential bridge between the visual encoder and the Large Language Model (LLM) in a Multimodal LLM (MLLM). Typically, MLLMs adopt a simple MLP to preserve all visual contexts via one-to-one transformation.…

Computer Vision and Pattern Recognition · Computer Science 2024-08-29 Wentong Li , Yuqian Yuan , Jian Liu , Dongqi Tang , Song Wang , Jie Qin , Jianke Zhu , Lei Zhang

Modern Large Language Models (LLMs) are increasingly trained to support very large context windows. We present Compactor, a training-free, query-agnostic KV compression strategy that uses approximate leverage scores to determine token…

Computation and Language · Computer Science 2025-12-10 Vivek Chari , Benjamin Van Durme

Large Language Models (LLMs) incur significant computational and memory costs when processing long prompts, as full self-attention scales quadratically with input length. Token compression aims to address this challenge by reducing the…

Computation and Language · Computer Science 2026-04-23 Zihao Xu , John Harvill , Ziwei Fan , Yizhou Sun , Hao Ding , Hao Wang

Recent advances in Multimodal Large Language Models (MLLMs) have significantly advanced video understanding tasks, yet challenges remain in efficiently compressing visual tokens while preserving spatiotemporal interactions. Existing…

Artificial Intelligence · Computer Science 2026-05-22 Bingjun Luo , Tony Wang , Hanqi Chen , Xinpeng Ding

Contrastive Language-Image Pretraining (CLIP) excels at learning generalizable image representations but often falls short in zero-shot inference on certain downstream datasets. Test-time adaptation (TTA) mitigates this issue by adjusting…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Zixin Wang , Dong Gong , Sen Wang , Zi Huang , Yadan Luo

Video large language models (VideoLLMs) show strong capability in video understanding, yet long-context inference is still dominated by massive redundant visual tokens in the prefill stage. We revisit token compression for VideoLLMs under a…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Xinying Lin , Xuyang Liu , Yiyu Wang , Teng Ma , Wenqi Ren

Recent advances in video-based multimodal large language models (Video-LLMs) have significantly improved video understanding by processing videos as sequences of image frames. However, many existing methods treat frames independently in the…

Computer Vision and Pattern Recognition · Computer Science 2025-09-24 Jindong Jiang , Xiuyu Li , Zhijian Liu , Muyang Li , Guo Chen , Zhiqi Li , De-An Huang , Guilin Liu , Zhiding Yu , Kurt Keutzer , Sungjin Ahn , Jan Kautz , Hongxu Yin , Yao Lu , Song Han , Wonmin Byeon

Recent Multi-modal Large Language Models (MLLMs) have been challenged by the computational overhead resulting from massive video frames, often alleviated through compression strategies. However, the visual content is not equally contributed…

Computer Vision and Pattern Recognition · Computer Science 2025-03-21 Zhihang Liu , Chen-Wei Xie , Pandeng Li , Liming Zhao , Longxiang Tang , Yun Zheng , Chuanbin Liu , Hongtao Xie

We have recently witnessed that ``Intelligence" and `` Compression" are the two sides of the same coin, where the language large model (LLM) with unprecedented intelligence is a general-purpose lossless compressor for various data…

Computer Vision and Pattern Recognition · Computer Science 2024-11-25 Kecheng Chen , Pingping Zhang , Hui Liu , Jie Liu , Yibing Liu , Jiaxin Huang , Shiqi Wang , Hong Yan , Haoliang Li

By treating visual tokens from visual encoders as text tokens, Multimodal Large Language Models (MLLMs) have achieved remarkable progress across diverse visual understanding tasks, leveraging the robust architectures of Large Language…

Computer Vision and Pattern Recognition · Computer Science 2024-12-03 Zeliang Zhang , Phu Pham , Wentian Zhao , Kun Wan , Yu-Jhe Li , Jianing Zhou , Daniel Miranda , Ajinkya Kale , Chenliang Xu

Large Language Models (LLMs) have been shown to be able to learn different tasks without explicit finetuning when given many input-output examples / demonstrations through In-Context Learning (ICL). Increasing the number of examples, called…

Document Visual Question Answering (VQA) demands robust integration of text detection, recognition, and spatial reasoning to interpret complex document layouts. In this work, we introduce DLaVA, a novel, training-free pipeline that…

Computer Vision and Pattern Recognition · Computer Science 2025-07-11 Ahmad Mohammadshirazi , Pinaki Prasad Guha Neogi , Ser-Nam Lim , Rajiv Ramnath

With the increasing complexity of video data and the need for more efficient long-term temporal understanding, existing long-term video understanding methods often fail to accurately capture and analyze extended video sequences. These…

Computer Vision and Pattern Recognition · Computer Science 2024-12-17 Sosuke Yamao , Natsuki Miyahara , Yuki Harazono , Shun Takeuchi

Existing methods for Video Reasoning Segmentation rely heavily on a single special token to represent the object in the keyframe or the entire video, inadequately capturing spatial complexity and inter-frame motion. To overcome these…

Computer Vision and Pattern Recognition · Computer Science 2025-03-03 Sitong Gong , Yunzhi Zhuge , Lu Zhang , Zongxin Yang , Pingping Zhang , Huchuan Lu

In the video coding process, the perceived quality of a compressed video is evaluated by full-reference quality evaluation metrics. However, it is difficult to obtain reference videos with perfect quality. To solve this problem, it is…

Image and Video Processing · Electrical Eng. & Systems 2022-05-10 Liqun Lin , Zheng Wang , Jiachen He , Weiling Chen , Yiwen Xu , Tiesong Zhao