A Comparative Study for Non-rigid Image Registration and Rigid Image Registration [article]

Xiaoran Zhang, Hexiang Dong, Di Gao, Xiao Zhao
2020 arXiv   pre-print
Image registration algorithms can be generally categorized into two groups: non-rigid and rigid. Recently, many deep learning-based algorithms employ a neural net to characterize non-rigid image registration function. However, do they always perform better? In this study, we compare the state-of-art deep learning-based non-rigid registration approach with rigid registration approach. The data is generated from Kaggle Dog vs Cat Competition and we test the algorithms' performance on rigid
more » ... rmation including translation, rotation, scaling, shearing and pixelwise non-rigid transformation. The Voxelmorph is trained on rigidset and nonrigidset separately for comparison and we also add a gaussian blur layer to its original architecture to improve registration performance. The best quantitative results in both root-mean-square error (RMSE) and mean absolute error (MAE) metrics for rigid registration are produced by SimpleElastix and non-rigid registration by Voxelmorph. We select representative samples for visual assessment.
arXiv:2001.03831v1 fatcat:cuw57dkoj5fjhfuedzsac67fh4