ResNeSt- Split-Attention Networks

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ResNeSt?Split-Attention NetworksResNetMulti-path ?Split-Attention

ResNet?ResNet?GoogleNet?Multi-path?SENet?SKNetSplit-Attention?Split-Attention Networks1. Feature-map Group??

Cardinality?K??cardinal groups?

Radix?R?splits

??( G = K times R )?

?K?R2. ?Split Attentionsplits[hat{U}^k = sum_{i=1}^{R} U_i^k] ( U_i^k ) ( k ) ( i ) ?GAP?[s_c^k = frac{1}{H times W} sum_{i=1}^{H} sum_{j=1}^{W} hat{U}^k_{c,i,j}] ( k ) ? ( c ) ?ReLU[a_{i,c}^k = frac{e^{G_{i,c}^k}}{sum_{j=1}^{R} e^{G_{j,c}^k}}, quad G = text{ReLU}(text{FC}(text{ReLU}(text{FC}(s^k))))] ( i ) ? ( c ) ?[V_c^k = sum_{i=1}^{R} a_{i,c}^k cdot U_{i,c}^k]3. ResNeSt?[V = text{Concat}{V^1, V^2, dots, V^K}]? ( Y = V + X ) ( X ) ( T ) [Y = V + T(X)]4. Radix-major? ( R times K ) ?radix-index?Radix-majorradix-index??

1?1?

3?3? ( R times K )

?SGD?GPU?Label Smoothing??Auto Augmentation??Mixup?Large Crop Size?? ( 224 times 224 ) ???Dropout??? backboneImageNet?COCO?Cityscapes?ResNeSt-50?ImageNet?Top-181.13%?

??Radix-majorCNN

?Amusi?ResNetResNeSt?Split-Attention Networks?Amusi?ResNeSt Happy?ResNeSt?

ResNeSt?Split-Attention?Swin Transformer?

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