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HDNet: High-Resolution Dual-Domain Learning for Spectral Compressive Imaging

CVPR 2022 · Image generation › Image restoration · approach: Pansharpening and spectral fusion · 209 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use dual-domain supervision with FDL alongside SDL (ablation)HDNet · KAIST test, 10 scenes (average)PSNR: 31.91 -> 34.34Helped
Use dual-domain supervision with FDL alongside SDL (ablation)HDNet · KAIST test, 10 scenes (average)SSIM: 0.9093 -> 0.9572Helped
Set FDL loss weight to λ=0.7 rather than λ=0.9 (ablation)HDNet · KAIST test, 10 scenes (average)PSNR: 33.75 -> 34.34Helped
Increase FDL loss weight from λ=0.7 to λ=0.9 (ablation)HDNet · KAIST test, 10 scenes (average)PSNR: 34.34 -> 33.75Hurt
Set frequency-distance coefficient α=2 rather than α=3 (ablation)HDNet · KAIST testSSIM: 0.9065 -> 0.9572Helped
Set frequency-distance coefficient α=1 rather than α=2 (ablation)HDNet · KAIST testPSNR: 34.34 -> 34.40Helped
Use patch-based frequency supervision with p=3 rather than whole-image frequency supervision with p=1 (ablation)HDNet · KAIST testPSNR: 32.96 -> 34.34Helped
Increase patch subdivision from p=3 to p=4 (ablation)HDNet · KAIST testPSNR: 34.34 -> 33.69Hurt
Use high-resolution spatial-spectral attention instead of TSA-Net attention (ablation)ResNet attention model · KAIST test, 10 scenes (average)PSNR/SSIM: 32.68 / 0.9267 -> 34.34 / 0.9572Helped
Replace high-resolution attention with lower-resolution TSA attention (ablation)HDNet spatial-spectral attention · HSI reconstruction attention visualizationhigh-frequency detail retentionHurt
Remove frequency-domain supervision (ablation)HDNet · HSI frequency reconstructionLFDHurt

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