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Update README.md
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cszn authored Aug 14, 2018
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Expand Up @@ -32,13 +32,18 @@ FDnCNN can handle noise level range of [0, 75] via a single model.

[Demo_FDnCNN_Color_Clip.m](Demo_FDnCNN_Color_Clip.m)

# Network Design Rationale

# Network Architecture and Design Rationale

- Network Architecture

<img src="figs/dncnn.png" width="800px"/>

- Batch normalization and residual learning are beneficial to Gaussian denoising (especially for a single noise level). The residual of a noisy image corrupted by additive white Gaussian noise (AWGN) follows a constant Gaussian distribution which stablizes batch normalization during training.

* Histogram of noisy patches, clean patches, and residual (noise) patches from a batch of training. The noise level is 25, the patch size is 40x40, the batch size is 128.

<img src="figs/batch1.png" width="800px"/>
<img src="figs/batch1.png" width="800px"/>
* Histogram of noisy patches, clean patches, and residual (noise) patches from another batch of training. The noise level is 25, the patch size is 40x40, the batch size is 128.

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