FPT+: A Parameter and Memory Efficient Transfer Learning Method for High-resolution Medical Image Classification

• URL: http://arxiv.org/abs/2408.02426v1
• Date: Mon, 5 Aug 2024 12:33:07 GMT
• Title: FPT+: A Parameter and Memory Efficient Transfer Learning Method for High-resolution Medical Image Classification
• Authors: Yijin Huang, Pujin Cheng, Roger Tam, Xiaoying Tang,
• Abstract summary: Fine-grained Prompt Tuning plus (FPT+) is a PETL method designed for high-resolution medical image classification. FPT+ performs transfer learning by training a lightweight side network and accessing pre-trained knowledge from a large pre-trained model. Experimental results demonstrate that FPT+ outperforms other PETL methods, using only 1.03% of the learnable parameters and 3.18% of the memory required for fine-tuning an entire ViT-B model.
• Score: 1.5791081894226173
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The success of large-scale pre-trained models has established fine-tuning as a standard method for achieving significant improvements in downstream tasks. However, fine-tuning the entire parameter set of a pre-trained model is costly. Parameter-efficient transfer learning (PETL) has recently emerged as a cost-effective alternative for adapting pre-trained models to downstream tasks. Despite its advantages, the increasing model size and input resolution present challenges for PETL, as the training memory consumption is not reduced as effectively as the parameter usage. In this paper, we introduce Fine-grained Prompt Tuning plus (FPT+), a PETL method designed for high-resolution medical image classification, which significantly reduces memory consumption compared to other PETL methods. FPT+ performs transfer learning by training a lightweight side network and accessing pre-trained knowledge from a large pre-trained model (LPM) through fine-grained prompts and fusion modules. Specifically, we freeze the LPM and construct a learnable lightweight side network. The frozen LPM processes high-resolution images to extract fine-grained features, while the side network employs the corresponding down-sampled low-resolution images to minimize the memory usage. To enable the side network to leverage pre-trained knowledge, we propose fine-grained prompts and fusion modules, which collaborate to summarize information through the LPM's intermediate activations. We evaluate FPT+ on eight medical image datasets of varying sizes, modalities, and complexities. Experimental results demonstrate that FPT+ outperforms other PETL methods, using only 1.03% of the learnable parameters and 3.18% of the memory required for fine-tuning an entire ViT-B model. Our code is available at https://github.com/YijinHuang/FPT.

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