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On the Integration of Self-Attention and Convolution

CVPR 2022 · Architectures and efficiency › Attention and transformers · approach: Sparse and structured attention · 551 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Replace PVT-T, PVT-S, Swin-T, or Swin-S attention blocks with ACmixTransformer backbones with segmentation heads · ADE20Kval mIoU: 37.1 -> 42.7; 42.4 -> 46.4; 44.5 -> 45.3; 47.6 -> 48.7Helped
Use ACmix in the compared detection backbonesResNet 50, SAN 19, PVT-T, and Swin-T · COCO detectionmAP: 36.7 -> 38.3; 38.2 -> 39.1; 36.7 -> 40.5; 46.0 -> 47.0; 50.5 -> 51.1Helped
Use ACmix instead of PVT-S or PVT-LPVT backbones · COCO RetinaNet inference on Ascend 910FPS: 50.3 -> 67.7; 24.3 -> 43.9Helped
Use ACmix instead of PVT-SPVT-S backbone · COCO RetinaNet inference on Ascend 910mAP: 42.2 -> 42.0Hurt
Combine self-attention and convolution paths with independently learned weights (ablation)Swin-ACmix-T · ImageNet-1Ktop-1: 81.3 -> 81.9Helped
Fix both path weights to 1 instead of learning them independently (ablation)Swin-ACmix-T · ImageNet-1Ktop-1: 81.9 -> 81.5Hurt
Constrain learned path weights to sum to 1 (ablation)Swin-ACmix-T · ImageNet-1Ktop-1: 81.9 -> 81.5Hurt
Replace tensor shifts with fixed-kernel group convolution (ablation)ACmix convolution path · Swin-Transformer-T, RTX2080TiFPS: 313 -> 419Helped
Replace fixed shift kernels with learnable kernels initialized randomly (ablation)ACmix convolution path · ImageNet-1K, Swin-Transformer-TTop-1: 81.4 -> 81.5No clear effect
Use learnable group-convolution kernels with designed shift initialization (ablation)ACmix convolution path · ImageNet-1K, Swin-Transformer-TTop-1: 81.4 -> 81.9Helped

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