The FreeU node applies frequency-domain modifications to a model's output blocks to enhance image generation quality. It works by scaling different channel groups and applying Fourier filtering to specific feature maps, allowing for fine-tuned control over the model's behavior during the generation process.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| --- | --- | --- | --- | --- |
| `model` | The model to apply FreeU modifications to | MODEL | Yes | - |
| `b1` | Backbone scaling factor for model_channels × 4 features (default: 1.1) | FLOAT | Yes | 0.0 - 10.0 |
| `b2` | Backbone scaling factor for model_channels × 2 features (default: 1.2) | FLOAT | Yes | 0.0 - 10.0 |
| `s1` | Skip connection scaling factor for model_channels × 4 features (default: 0.9) | FLOAT | Yes | 0.0 - 10.0 |
| `s2` | Skip connection scaling factor for model_channels × 2 features (default: 0.2) | FLOAT | Yes | 0.0 - 10.0 |

## Outputs

| Output Name | Description | Data Type |
| --- | --- | --- |
| `model` | The modified model with FreeU patches applied | MODEL |

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/FreeU/en.md)

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