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🧠 AI🟢 BullishImportance 7/10

What Do Visual Tokens Really Encode? Uncovering Sparsity and Redundancy in Multimodal Large Language Models

arXiv – CS AI|Yingqi Fan, Junlong Tong, Anhao Zhao, Xiaoyu Shen||7 views
🤖AI Summary

Researchers developed EmbedLens, a tool to analyze how multimodal large language models process visual information, finding that only 60% of visual tokens carry meaningful image-specific information. The study reveals significant inefficiencies in current MLLM architectures and proposes optimizations through selective token pruning and mid-layer injection.

Key Takeaways
  • Visual tokens in MLLMs partition into sink, dead, and alive categories with only alive tokens (~60%) carrying image-specific meaning.
  • Alive tokens already encode rich visual cues like objects, colors, and OCR before entering the language model.
  • Internal visual computations are redundant for most standard tasks in current MLLM architectures.
  • Vision-centric tasks benefit more from mid-layer injection rather than initial embedding space processing.
  • The findings enable more efficient MLLM architectures through token pruning and reduced visual computation.
Read Original →via arXiv – CS AI
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