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Interpreting Super-Resolution Networks With Local Attribution Maps

CVPR 2021 · Image generation › Super-resolution · approach: CNN and transformer SR architectures · 346 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use information from a wider range of input pixelsSR networks · 48 SR networks evaluated on the challenging image setPSNR: both larger than 0.8Helped
Increase FSRCNN depth and widthFSRCNN · SR performance and DI analysisPSNRHelped
Increase EDSR depth by adding convolution layersEDSR · SR performance and DI analysisPSNRHelped
Increase the number of feature maps per EDSR layerEDSR · SR performance and DI analysisPSNRNo clear effect
Add global operations without a sufficiently large effective receptive fieldIMDN, RFDN, and RNAN · SR test set (150 challenging images)DINo clear effect
Use attention or non-local operations to access distant input pixelsAttention and non-local SR networks · SR image patchesDIHelped
Rely on a wider area of pixels without using that information effectivelySAN and DRLN · SR image patchesPSNRHurt
Use a blurred image as the attribution baseline and progressive blurring as the pathLAM for SR networks · SR attribution analysisAttribution validityHelped

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