MIDL 2021, D2, Czolbe et. al., Full Paper
Channel: MIDL Society
Date: 2021-08-08

D2 - Semantic similarity metrics for learned image registration   

Steffen Czolbe, Oswin Krause, Aasa Feragen   

Conference page: https://2021.midl.io/papers/D2   

Abstract: We propose a semantic similarity metric for image registration. Existing metrics like euclidean distance or normalized cross-correlation focus on aligning intensity values, giving difficulties with low intensity contrast or noise. Our approach learns dataset-specific features that drive the optimization of a learning-based registration model. We train both an unsupervised approach using an auto-encoder, and a semi-supervised approach using supplemental segmentation data to extract semantic features for image registration. Comparing to existing methods across multiple image modalities and applications, we achieve consistently high registration accuracy. A learned invariance to noise gives smoother transformations on low-quality images.