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VLMQ: Token Saliency-Driven Post-Training Quantization for Vision-language Models

arXiv – CS AI|Yufei Xue, Yushi Huang, Jiawei Shao, Lunjie Zhu, Chi Zhang, Xuelong Li, Jun Zhang|
🤖AI Summary

Researchers introduced VLMQ, a post-training quantization framework specifically designed for vision-language models that addresses visual over-representation and modality gaps. The method achieves significant performance improvements, including 16.45% better results on MME-RealWorld under 2-bit quantization compared to existing approaches.

Key Takeaways
  • VLMQ addresses two key issues in vision-language model quantization: visual over-representation and modality gaps between text and vision tokens.
  • The framework uses gradient-driven importance factors to prioritize salient tokens while suppressing redundant ones during quantization.
  • Lightweight block-wise backpropagation is employed for efficient factor acquisition without full model retraining.
  • Testing across 8 benchmarks and models ranging from 0.5B to 32B parameters demonstrates state-of-the-art performance.
  • The method shows particularly strong results under low-bit quantization settings, enabling more efficient model deployment.
Read Original →via arXiv – CS AI
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