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Learning Real-World Image De-weathering with Imperfect Supervision
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Proposes a Consistent Label Constructor (CLC) that uses multi-frame inputs to produce pseudo-labels consistent with degraded inputs, and an Information Allocation Strategy (IAS) that jointly supervises de-weathering with pseudo-labels (L1) and original labels (rain-robust contrastive plus sliced Wasserstein losses) to handle imperfect real-world supervision.
Problem
Real-world de-weathering datasets captured sequentially contain illumination, position, and texture inconsistencies between degraded inputs and ground-truth labels, which degrade supervised training of de-weathering networks.
Approach
Use information bottleneck theory to build a pseudo-label from a multi-frame label constructor that stays consistent with the input while removing most degradation, then combine it with the original label via a loss allocation that uses L1 for the pseudo-label and feature/distribution-level losses (robust to misalignment and color shifts) for the original label.
Key results
- Ours-Restormer improves overall PSNR from 21.51 to 22.17 dB on GT-Rain-Snow, and Ours-RainRobust improves 22.01 to 22.40 dB.
- On WeatherStream, Ours-Restormer and Ours-RainRobust gain 0.21 dB and 0.24 dB PSNR respectively over their baselines.
- Ablation: using only the pseudo-label raises RainRobust overall PSNR from 22.01 to 22.18 dB; combining with the original label reaches 22.40 dB.
Measured effects reported in the paper
| What was changed | Where | Measured | Effect |
|---|---|---|---|
| Add CLC + IAS to Restormer | Restormer · GT-Rain-Snow | overall PSNR: 21.51 -> 22.17 | Helped |
| Add CLC + IAS to RainRobust | RainRobust · GT-Rain-Snow | overall PSNR: 22.01 -> 22.40 | Helped |
| Add CLC + IAS to Restormer | Restormer · WeatherStream | overall PSNR: 22.94 -> 23.15 | Helped |
| Add CLC + IAS to RainRobust | RainRobust · WeatherStream | overall PSNR: 22.78 -> 23.02 | Helped |
| Use 3 rather than 1 frame in CLC (ablation) | CLC + RainRobust · GT-Rain-Snow | de-weathering PSNR: 22.19 -> 22.34 | Helped |
| Use 5 rather than 3 frames in CLC (ablation) | CLC + RainRobust · GT-Rain-Snow | de-weathering PSNR: 22.34 -> 22.40 | Helped |
| Use 7 rather than 5 frames in CLC (ablation) | CLC + RainRobust · GT-Rain-Snow | de-weathering PSNR: 22.40 -> 22.39 | Hurt |
| Add pseudo-label supervision to original-label supervision (ablation) | RainRobust · GT-Rain-Snow | PSNR: 22.01 -> 22.40 | Helped |
| Use pseudo-label instead of original-label supervision (ablation) | RainRobust · GT-Rain-Snow | PSNR: 22.01 -> 22.18 | Helped |
| Add SW loss to pseudo-label supervision, without rain-robust loss (ablation) | RainRobust · GT-Rain-Snow | overall PSNR: 22.18 -> 22.22 | Helped |
| Add rain-robust loss to pseudo-label supervision, without SW loss (ablation) | RainRobust · GT-Rain-Snow | overall PSNR: 22.18 -> 22.28 | Helped |
| Apply guided filtering, optical flow, or misalignment-tolerant L1 instead of the proposed method (ablation) | RainRobust · GT-Rain-Snow | overall PSNR: 22.01 -> 22.14; 22.15; 22.18 | Mixed |
Surprising findings
- Pseudo-labels alone as supervision outperform the original imperfect labels (22.18 vs 22.01 dB PSNR), though combining both is best.
Limitations
- Gains are modest in absolute PSNR (about 0.2 to 0.7 dB).
- CLC requires multiple adjacent frames, which limits use to video-derived datasets.
- Pseudo-label still trades off degradation removal against consistency.
Experimental setup
Datasets: GT-Rain-Snow WeatherStream Internet-Data
Benchmarks: GT-Rain-Snow test split (45 scenes) Out-of-distribution rain/snow/fog images
Metrics: PSNR SSIM PI CLIP-IQA
Baselines: Restormer RainRobust Guided Filter Optical Flow Misalign-Tolerate l1
Builds on: Restormer RainRobust information bottleneck theory InfoNCE
Closest papers by meaning
- Continuous Adverse Weather Removal via Degradation-Aware Distillation (CVPR 2025 · similarity 0.85)
- Real-World Adverse Weather Image Restoration via Dual-Level Reinforcement Learning with High-Quality Cold Start (NeurIPS 2025 · similarity 0.85)
- SnowMaster: Comprehensive Real-world Image Desnowing via MLLM with Multi-Model Feedback Optimization (CVPR 2025 · similarity 0.85)
- CoA: Towards Real Image Dehazing via Compression-and-Adaptation (CVPR 2025 · similarity 0.84)
- Semantic Segmentation in Multiple Adverse Weather Conditions with Domain Knowledge Retention (AAAI 2024 · similarity 0.84)
- AWRaCLe: All-Weather Image Restoration Using Visual In-Context Learning (AAAI 2025 · similarity 0.84)
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