MCPO: Modality-Contrastive Preference Optimization for Multimodal Chain-of-Thought Compression
Modality-Contrastive Preference Optimization (MCPO), a highly sample-efficient two-stage length-compression method that requires fewer than 900 training samples, and adopts a highly nonlinear odds-ratio formulation that provides steep gradients in the with-image context to reinforce length constraints for preferred tra...
Guang-Heng Yang, Zhen-Liang Ni, Zhen-Kai Wu et al.
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