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Spectrum-to-Kernel Translation for Accurate Blind Image Super-Resolution

NeurIPS 2021 · Image generation › Super-resolution · approach: Blind super-resolution · 7 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use S2K kernel estimation with RCAN rather than IKCBlind SR · DIV2K, Gaussian, 2×PSNR: 28.45 -> 29.77Helped
Use S2K kernel estimation with RCAN rather than IKCBlind SR · Flicker2K, Gaussian, 4×PSNR: 25.64 -> 26.10Helped
Use S2K kernel estimation with SFTMD rather than IKCBlind SR · DIV2K, Motion, 2×PSNR: 24.96 -> 30.95Helped
Add the relative shape loss L_s (ablation)S2K · DIV2K validation, random Gaussian kernels, 3×PSNR: 19.46 -> 26.68Helped
Add the relative shape loss L_s (ablation)S2K · DIV2K validation, random Gaussian kernels, 3×SSIM: 0.4952 -> 0.7562Helped
Add the smoothing loss L_reg (ablation)S2K · DIV2K validation, random Gaussian kernels, 3×PSNR: 26.68 -> 26.94Helped
Add the smoothing loss L_reg (ablation)S2K · DIV2K validation, random Gaussian kernels, 3×SSIM: 0.7562 -> 0.7563Helped
Add the pixel loss L_1 (ablation)S2K · DIV2K validation, random Gaussian kernels, 3×PSNR: 8.462 -> 26.68Helped
Use DFT spectrum input instead of spatial input, with kernel-matrix output (ablation)S2K · DIV2K validation, random Gaussian kernels, 3×PSNR: 22.50 -> 26.96Helped
Predict an up-sampled kernel matrix instead of kernel parameters (ablation)S2K with DFT input · DIV2K validation, random Gaussian kernels, 3×PSNR: 20.53 -> 26.96Helped
Use DFT spectrum input and up-sampled kernel-matrix output (ablation)S2K · DIV2K validation, random Gaussian kernels, 3×PSNR: 20.01 -> 26.96Helped

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