Improved Trainable Calibration Method for Neural Networks on Medical Imaging Classification

Autor:	Liang, Gongbo, Zhang, Yu, Wang, Xiaoqin, Jacobs, Nathan
Rok vydání:	2020
Předmět:	Computer Science - Computer Vision and Pattern Recognition Computer Science - Machine Learning Electrical Engineering and Systems Science - Image and Video Processing
Druh dokumentu:	Working Paper
Popis:	Recent works have shown that deep neural networks can achieve super-human performance in a wide range of image classification tasks in the medical imaging domain. However, these works have primarily focused on classification accuracy, ignoring the important role of uncertainty quantification. Empirically, neural networks are often miscalibrated and overconfident in their predictions. This miscalibration could be problematic in any automatic decision-making system, but we focus on the medical field in which neural network miscalibration has the potential to lead to significant treatment errors. We propose a novel calibration approach that maintains the overall classification accuracy while significantly improving model calibration. The proposed approach is based on expected calibration error, which is a common metric for quantifying miscalibration. Our approach can be easily integrated into any classification task as an auxiliary loss term, thus not requiring an explicit training round for calibration. We show that our approach reduces calibration error significantly across various architectures and datasets. Comment: Accepted to the 31th British Machine Vision Conference (BMVC 2020)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2009.04057 Zobrazit plný text záznamu View this record from Arxiv