语义分割中的nonlocal[7]- Co-occurrent Features in Semantic Segmentation

https://openaccess.thecvf.com/content_CVPR_2019/papers/Zhang_Co-Occurrent_Features_in_Semantic_Segmentation_CVPR_2019_paper.pdf
Co-occurrent Features in Semantic Segmentation
在non-local的基础上加了一个gap，没啥好说的

看图就知道怎么做的了，直接看结果

gap进一步提升了0.5个点