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ClassSR: A General Framework to Accelerate Super-Resolution Networks by Data Characteristic

CVPR 2021 · Image generation › Super-resolution · approach: CNN and transformer SR architectures · 209 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
route sub-images through difficulty-specific branchesFSRCNN · Test8KFLOPs: 468M(100%) -> 238M(51%)Helped
route sub-images through difficulty-specific branchesCARN · Test8KFLOPs: 1.15G(100%) -> 608M(53%)Helped
route sub-images through difficulty-specific branchesSRResNet · Test8KFLOPs: 5.20G(100%) -> 2.70G(52%)Helped
route sub-images through difficulty-specific branchesRCAN · Test8KFLOPs: 32.60G(100%) -> 16.36G(50%)Helped
route sub-images through difficulty-specific branchesRCAN · Test8KPSNR: 33.76dB -> 33.73dBHurt
remove Class-Loss (ablation)ClassSR-FSRCNN · DIV2K validation during trainingPSNRHurt
add Class-Loss (ablation)ClassSR-FSRCNN · DIV2K validation during trainingclassification stabilityHelped
remove Average-Loss (ablation)ClassSR-FSRCNN · DIV2K validation during trainingFLOPsHurt
add Average-Loss (ablation)ClassSR-FSRCNN · DIV2K validation during trainingbranch utilizationHelped
increase the number of branches from 2 to 5 (ablation)ClassSR-FSRCNN · Test8KPSNR: 32.72dB -> 32.74dBHelped
vary branch channel and layer configurations (ablation)ClassSR-SRResNet · Test2KPSNR: 26.20dB; 26.20dBNo clear effect
replace SR-Module with DnCNN branches under ClassSRDnCNN · Test2KPSNR: 31.20dB -> 31.23dBHelped

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