Spatial-Frequency Network for Segmentation of Remote Sensing Images

We describe a deep learning system for satellite image segmentation. Our CNN model embeds contextual feature dependencies in both spatial and frequency domains. Its Spatial Weighting Module uses a multi-scale pooling layer to represent correlations at longer length scales in the spatial domain. Its Frequency Weighting Module uses frequency-domain information to better discriminate between object classes. Experimental results on the Potsdam dataset demonstrate that our model has a 1.9% higher average F1 accuracy than previous methods.