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"AdaIR: Adaptive All-in-One Image Restoration via Frequency Mining and Modulation"

Below podcast is generated with Google's Illuminate.

Wave goodbye to blurry, noisy, hazy images!

Restoring images by understanding degradation's unique spectral fingerprint.

The paper introduces AdaIR, an adaptive all-in-one image restoration network. It tackles diverse image degradations using frequency domain analysis for effective and efficient restoration within a single model.

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Paper - https://arxiv.org/abs/2403.14614

Original Problem 😞:

→ Existing image restoration methods are often specialized for specific degradation types like noise or blur.

→ These methods lack generalizability and require separate models for each degradation.

→ All-in-one models address multiple degradations but often ignore frequency domain information.

→ Different degradations impact different frequency bands, requiring tailored restoration.

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Key Insights 🤔:

→ Different image degradations affect distinct frequency subbands.

→ Noisy and rainy images are contaminated with high-frequency content.

→ Low-light and hazy images are dominated by low-frequency degradation.

→ Effective all-in-one restoration should consider these frequency variations.

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Solution in this Paper ✨:

→ AdaIR network is proposed for adaptive all-in-one image restoration.

→ It uses Adaptive Frequency Learning Blocks (AFLB) within a Transformer-based U-shaped architecture.

→ AFLB contains Frequency Mining Module (FMiM) and Frequency Modulation Module (FMoM).

→ FMiM extracts low and high-frequency features guided by adaptive spectral decomposition of the degraded input image.

→ FMoM facilitates interaction between these frequency features using bidirectional attention units (H-L and L-H).

→ This allows adaptive restoration by emphasizing informative frequency bands based on input degradation.

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Results 📈:

→ AdaIR outperforms PromptIR by 0.63 dB PSNR on average across dehazing, deraining, and denoising tasks.

→ Achieves a 2.27 dB PSNR gain over PromptIR on image deraining.

→ In single-task setting, AdaIR improves PSNR by 0.49 dB on dehazing and 1.86 dB on deraining compared to PromptIR.

→ On five-degradation tasks, AdaIR shows 1.86 dB average PSNR gain over IDR, with over 5 dB gain on dehazing.

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