Tasting the cake: evaluating self-supervised generalization on out-of-distribution multimodal MRI data

Autor:	Fedorov, Alex, Geenjaar, Eloy, Wu, Lei, DeRamus, Thomas P., Calhoun, Vince D., Plis, Sergey M.
Rok vydání:	2021
Předmět:	Computer Science - Computer Vision and Pattern Recognition
Druh dokumentu:	Working Paper
Popis:	Self-supervised learning has enabled significant improvements on natural image benchmarks. However, there is less work in the medical imaging domain in this area. The optimal models have not yet been determined among the various options. Moreover, little work has evaluated the current applicability limits of novel self-supervised methods. In this paper, we evaluate a range of current contrastive self-supervised methods on out-of-distribution generalization in order to evaluate their applicability to medical imaging. We show that self-supervised models are not as robust as expected based on their results in natural imaging benchmarks and can be outperformed by supervised learning with dropout. We also show that this behavior can be countered with extensive augmentation. Our results highlight the need for out-of-distribution generalization standards and benchmarks to adopt the self-supervised methods in the medical imaging community. Comment: Presented as a RobustML workshop paper at ICLR 2021
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2103.15914 Zobrazit plný text záznamu View this record from Arxiv