Peer Learning for Skin Lesion Classification

• URL: http://arxiv.org/abs/2103.03703v2
• Date: Mon, 8 Mar 2021 10:25:30 GMT
• Title: Peer Learning for Skin Lesion Classification
• Authors: Tariq Bdair, Nassir Navab and Shadi Albarqouni
• Abstract summary: Skin cancer is one of the most deadly cancers worldwide. Recent deep-learning methods have shown a dermatologist-level performance in skin cancer classification. FedPerl is a semi-supervised federated learning method.
• Score: 53.425900196763756
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Skin cancer is one of the most deadly cancers worldwide. Yet, it can be reduced by early detection. Recent deep-learning methods have shown a dermatologist-level performance in skin cancer classification. Yet, this success demands a large amount of centralized data, which is oftentimes not available. Federated learning has been recently introduced to train machine learning models in a privacy-preserved distributed fashion demanding annotated data at the clients, which is usually expensive and not available, especially in the medical field. To this end, we propose FedPerl, a semi-supervised federated learning method that utilizes peer learning from social sciences and ensemble averaging from committee machines to build communities and encourage its members to learn from each other such that they produce more accurate pseudo labels. We also propose the peer anonymization (PA) technique as a core component of FedPerl. PA preserves privacy and reduces the communication cost while maintaining the performance without additional complexity. We validated our method on 38,000 skin lesion images collected from 4 publicly available datasets. FedPerl achieves superior performance over the baselines and state-of-the-art SSFL by 15.8%, and 1.8% respectively. Further, FedPerl shows less sensitivity to noisy clients.

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