https://github.com/SparknightLLC/ComfyUI-ImageAutotone

A node for ComfyUI that takes an input image and clips the color channels independently to increase contrast and alter color cast. This is a reinterpretation of PhotoShop's "Auto Tone" algorithm.
https://github.com/SparknightLLC/ComfyUI-ImageAutotone

Last synced: about 2 months ago
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A node for ComfyUI that takes an input image and clips the color channels independently to increase contrast and alter color cast. This is a reinterpretation of PhotoShop's "Auto Tone" algorithm.

• Host: GitHub
• URL: https://github.com/SparknightLLC/ComfyUI-ImageAutotone
• Owner: SparknightLLC
• Created: 2024-12-25T04:38:19.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2025-04-15T20:35:55.000Z (2 months ago)
• Last Synced: 2025-04-15T21:34:38.479Z (about 2 months ago)
• Language: Python
• Size: 1.2 MB
• Stars: 9
• Watchers: 0
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

• awesome-comfyui - **ComfyUI-ImageAutotone**

README

        
# ComfyUI-ImageAutotone

A node for [ComfyUI](https://github.com/comfyanonymous/ComfyUI) that takes an input image and clips the color channels independently to increase contrast and alter color cast. This is a reinterpretation of PhotoShop's "Auto Tone" algorithm.

Special thank you to Gerald Bakker for his writeup on Adobe's various algorithms:

- https://geraldbakker.nl/psnumbers/auto-options.html

![workflow_image_autotone](workflows/workflow_image_autotone.png)

### Installation

Simply drag the image above into ComfyUI and use [ComfyUI Manager » Install Missing Custom Nodes](https://github.com/ltdrdata/ComfyUI-Manager).

### Inputs

- `image`: The input image(s) to process with the autotone algorithm

- `shadows`: The color that defines the shadows of the image. This should be a comma-separated RGB value (e.g., '0,0,0' for black) or HEX string (e.g. '#000000').

- `highlights`: The color that defines the highlights in the image. This should be a comma-separated RGB value (e.g., '255,255,255' for white) or HEX string (e.g. '#FFFFFF').

- `shadow_clip`: The percentage of pixels to clip from the shadows. This is a value between 0 and 1.

- `highlight_clip`: The percentage of pixels to clip from the highlights. This is a value between 0 and 1.

### Bonus Comparison

Below is a workflow that demonstrates the difference between Image Autotone and a few other image contrast nodes on the ComfyUI Registry.

![workflow_comparison](workflows/workflow_comparison.png)

---

This node was adapted from the `[image_edit]` shortcode of [Unprompted](https://github.com/ThereforeGames/unprompted), my Automatic1111 extension.