Learned Thresholds Token Merging and Pruning for Vision Transformers

Published: 16 Aug 2023, Last Modified: 16 Aug 2023Accepted by TMLREveryoneRevisionsBibTeX
Abstract: Vision transformers have demonstrated remarkable success in a wide range of computer vision tasks over the last years, however, their high computational costs remains a significant barrier to their practical deployment. In particular, the complexity of transformer models is quadratic with respect to the number of input tokens. Therefore techniques that reduce the number of input tokens that need to be processed have been proposed. This paper introduces Learned Thresholds token Merging and Pruning (LTMP), a novel approach that leverages the strengths of both token merging and token pruning. LTMP uses learned threshold masking modules that dynamically determine which tokens to merge and which to prune. We demonstrate our approach with extensive experiments on vision transformers on the ImageNet classification task. Our results demonstrate that LTMP achieves state-of-the-art accuracy across reduction rates while requiring only a single fine-tuning epoch, which is an order of magnitude faster than previous methods.
Submission Length: Regular submission (no more than 12 pages of main content)
Code: https://github.com/Mxbonn/ltmp
Assigned Action Editor: ~Mathieu_Salzmann1
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
Submission Number: 1152