PAR: Prompt-Aware Token Reduction Method for Efficient Large Multimodal Models

TL;DR

PAR is a prompt-aware token reduction method that significantly decreases computational costs of multimodal models by adaptively clustering essential visual tokens, maintaining high accuracy with minimal performance loss.

Contribution

This paper introduces a novel, plug-and-play token reduction approach that leverages prompt-awareness to efficiently reduce visual tokens in multimodal models without extra training.

Findings

Reduces FLOPs by 83% across visual tasks.

Achieves 89% compression ratio while retaining 97% accuracy.

Doubles token reduction compared to prior methods.

Abstract

Multimodal large language models (MLLMs) demonstrate strong performance across visual tasks, but their efficiency is hindered by significant computational and memory demands from processing long contexts in multimodal inputs. To address this, we introduce PAR (Prompt-Aware Token Reduction), a novel and plug-and-play approach that reduces visual tokens efficiently without compromising model performance. Unlike previous methods that rely heavily on attention mechanisms and overlooking cross-modal interactions , we uses a prompt-aware strategy to adpative identify and cluster essential visual tokens. PAR categorizes visual context redundancy into two types: external and internal. External redundancy is minimized through semantic retrieval, while internal redundancy is addressed using a token routing mechanism. This method substantially reduces computational load without requiring additional training or complex architectural modifications. \textbf{Experimental results demonstrate that across various visual question answering tasks, PAR reduces FLOPs by 83\% with a compression ratio of 89\%, while retaining 97\% of baseline accuracy.} The adaptive design of PAR achieves a 2x token reduction ratio compared to prior approaches, enabling a better balance between performance and efficiency.