> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# ImageSharpen - ComfyUI Built-in Node Documentation

> Complete documentation for the ImageSharpen node in ComfyUI. Learn its inputs, outputs, parameters and usage.

The ImageSharpen node enhances the clarity of an image by accentuating its edges and details. It applies a sharpening filter to the image, which can be adjusted in intensity and radius, thereby making the image appear more defined and crisp.

## Inputs

| Field            | Data Type | Description                                                                                                                                                                |
| ---------------- | --------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `image`          | `IMAGE`   | The input image to be sharpened. This parameter is crucial as it determines the base image on which the sharpening effect will be applied.                                 |
| `sharpen_radius` | `INT`     | Defines the radius of the sharpening effect. A larger radius means that more pixels around the edge will be affected, leading to a more pronounced sharpening effect.      |
| `sigma`          | `FLOAT`   | Controls the spread of the sharpening effect. A higher sigma value results in a smoother transition at the edges, while a lower sigma makes the sharpening more localized. |
| `alpha`          | `FLOAT`   | Adjusts the intensity of the sharpening effect. Higher alpha values result in a stronger sharpening effect.                                                                |

## Outputs

| Field   | Data Type | Description                                                                                    |
| ------- | --------- | ---------------------------------------------------------------------------------------------- |
| `image` | `IMAGE`   | The sharpened image, with enhanced edges and details, ready for further processing or display. |