ComfyUI Image Loop

ComfyUI-Loop is essentially a pair of nodes designed to create a simple image loop within your workflows. The operating principle is straightforward: the Save Image (LOOP) node saves an image by overwriting the file specified in the 'image path' field, making it automatically available for the next iteration. This functionality is primarily intended for inpainting workflows.

The current code is relatively basic, but special care has been taken to preserve image data quality and prevent degradation. Visually, there is no noticeable loss in quality even after 150 iterations, and theoretically, this should remain true after a thousand consecutive loops and saves.

The day after releasing the initial version on GitHub, I added two more nodes from my toolkit: Cut Image (LOOP) and Paste Image (LOOP). These nodes facilitate working with large images by cutting a specific part of an image, sending it to your inpainting workflow, KSampler, or other processes, and then pasting it back in place afterward. You can find an example workflow in the example_workflow folder.

Usage

• Set the image path ('/path/to/your/file.png') in the Load Image (LOOP) node using (supports PNG, JPG, GIF, etc.).

• Connect the path output from Load Image (LOOP) to the image_path input of Save Image (LOOP).

• The mask input in Save Image (LOOP) is optional.

• Enable save steps if you want to keep a copy of the file at each iteration.

Limitations

• No support for image lists or batch inputs in 'Save Image (LOOP)'. If a list is provided, only the first image will be saved and displayed repeatedly.

• Mask format compatibility: If a mask is used, it must match the image format to be saved in the alpha channel. Otherwise, the output will be saved in RGB mode instead of RGBA.

• No preview is available in the 'Load Image (LOOP)' node (But you know what you’ve loaded, right? :) ). This design choice improves speed and prevents ComfyUI from hanging when loading large 64Mpixels images :).

• No preview in 'Save Image' if the image is located outside the output folder.

• Large file sizes due to uncompressed output for maximum quality preservation.

Installation

No additional dependencies are required. Search for 'Loop' in the ComfyUI Custom Nodes Manager or copy the ComfyUI-Loop folder into the Custom Nodes directory — and you're ready to go!

Future Plans

This is an alpha version created in one evening. I plan to revisit the code later (I’m currently working on something bigger and smarter), but it works well for basic use. If you encounter issues or have suggestions, don’t hesitate to ask on the repo ! ♥️
https://github.com/Hullabalo/ComfyUI-Loop