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arXiv 2511.21150cs.CVcs.AI

LLaVA-UHD v3:渐进式视觉压缩用于多模态大语言模型中的高效原分辨率编码

LLaVA-UHD v3: Progressive Visual Compression for Efficient Native-Resolution Encoding in MLLMs

Tsinghua University(清华大学);University of Chinese Academy of Sciences(中国科学院大学);Institute of Automation, Chinese Academy of Sciences(中国科学院自动化研究所);Aerospace Information Research Institute, Chinese Academy of Sciences(中国科学院航天信息研究所);School of Advanced Interdisciplinary Sciences, University of Chinese Academy of Sciences(中国科学院大学先进交叉学科学院)

Shichu Sun, Yichen Zhang, Haolin Song, Zonghao Guo, Chi Chen, Yidan Zhang, Yuan Yao, Zhiyuan Liu, Maosong Sun

AI总结:

LLaVA-UHD v3通过渐进式视觉压缩方法,实现高效原分辨率编码,减少TTFT并提升多模态大语言模型性能。

摘要:

在多模态大语言模型(MLLMs)中,视觉编码后接令牌压缩已成为标准的架构范式。许多最近的MLLMs越来越倾向于使用全局原分辨率视觉编码而非基于切片的方法。为了研究这一趋势,我们系统地比较了它们在视觉语言理解和注意力模式上的行为,发现全局编码增强了整体能力,但以更大的计算开销为代价。为了解决这个问题,我们提出了LLaVA-UHD v3,这是一个基于我们提出的渐进式视觉压缩(PVC)方法的MLLM,可以无缝集成到标准视觉Transformer(ViT)中,以实现高效的原分辨率编码。PVC方法由两个关键模块组成:(i)精细的补丁嵌入,支持灵活的补丁大小缩放以实现细粒度的视觉建模,(ii)窗口化令牌压缩,分层部署在ViT层中,以逐步聚合局部令牌表示。这两个模块共同调节,一个广泛预训练的ViT可以重新配置为高效的架构,同时在很大程度上保持通用性。在广泛的基准测试中,转换后的ViT,称为ViT-UHD,表现出与MoonViT相当的性能,同时在相同的MLLM架构中将TTFT(时间到第一个令牌)减少了2.4倍。基于ViT-UHD,LLaVA-UHD v3也实现了与Qwen2-VL相当的性能,同时进一步将TTFT减少了1.9倍。我们将发布所有代码和检查点以支持未来在高效MLLMs上的研究。

英文摘要:

Visual encoding followed by token condensing has become the standard architectural paradigm in multi-modal large language models (MLLMs). Many recent MLLMs increasingly favor global native- resolution visual encoding over slice-based methods. To investigate this trend, we systematically compare their behavior on vision-language understanding and attention patterns, revealing that global encoding enhances overall capability but at the expense of greater computational overhead. To address this issue, we present LLaVA-UHD v3, an MLLM centered upon our proposed Progressive Visual Compression (PVC) method, which can be seamlessly integrated into standard Vision Transformer (ViT) to enable efficient native-resolution encoding. The PVC approach consists of two key modules: (i) refined patch embedding, which supports flexible patch-size scaling for fine-grained visual model- ing, (ii) windowed token compression, hierarchically deployed across ViT layers to progressively aggregate local token representations. Jointly modulated by these two modules, a widely pretrained ViT can be reconfigured into an efficient architecture while largely preserving generality. Evaluated across extensive benchmarks, the transformed ViT, termed ViT-UHD, demonstrates competitive performance with MoonViT while reducing TTFT (time-to-first-token) by 2.4x, when developed within an identical MLLM architecture. Building upon ViT-UHD, LLaVA-UHD v3 also achieves competitive performance to Qwen2-VL, while further reducing TTFT by 1.9x. We will release all code and checkpoints to support future research on efficient MLLMs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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