ComfyUI Extension: Olm Curve Editor for ComfyUI

ComfyUI-Olm-CurveEditor Introduction

The ComfyUI-Olm-CurveEditor is a specialized extension designed to enhance your experience with ComfyUI by providing precise color control over images. This extension allows you to adjust the color curves of your images directly within the ComfyUI node graph, focusing on the Red, Green, Blue (RGB), and Luma channels. It is a lightweight and standalone solution, specifically crafted to apply color curves efficiently and cleanly. For AI artists, this means you can fine-tune the tones of your images with ease, much like using traditional color grading tools found in photo editing software. Whether you're working on a small project or a high-resolution 4K image, the ComfyUI-Olm-CurveEditor offers a fast and responsive interface to achieve the desired color adjustments.

How ComfyUI-Olm-CurveEditor Works

At its core, the ComfyUI-Olm-CurveEditor operates by allowing you to manipulate color curves through an intuitive graphical interface. Imagine it as drawing a line on a graph where the horizontal axis represents the input color values and the vertical axis represents the output color values. By adjusting this line, you can control how each color channel (Red, Green, Blue, and Luma) is modified. For example, if you want to make the reds in your image more vibrant, you can adjust the curve for the Red channel to increase its intensity. The extension provides real-time feedback, so you can immediately see the effects of your adjustments on the image, making it a powerful tool for artists who want to experiment with different color tones and effects.

ComfyUI-Olm-CurveEditor Features

• Editable Curve Graph: This feature allows you to edit and visualize color curves in real-time. The graph is responsive and scales to fit your adjustments, ensuring that you have a clear view of your changes. The endpoints of the curves are clamped between 0 and 1 to prevent any unwanted overshoots, maintaining the integrity of your image's colors.
• Smooth User Experience: The interface is designed for ease of use. You can click to add new points on the curve, drag points to adjust the curve, and shift-click to remove points. This intuitive interaction model makes it easy to experiment with different color adjustments.
• Channel Tabs: You can switch between different color channels (R, G, B, and Luma) using tabs. Each channel can be adjusted independently, allowing for precise control over the color balance of your image.
• Reset Buttons: If you need to start over, you can reset all channels at once or reset individual channels to their default linear curve. This feature is particularly useful if you want to quickly revert changes and try a different approach.
• Presets: The extension comes with 20 built-in presets, and you can create your own. Presets are stored in the curve_presets folder, making it easy to save and reuse your favorite settings.

ComfyUI-Olm-CurveEditor Models

The ComfyUI-Olm-CurveEditor does not include different models in the traditional sense, as its primary function is to provide a user interface for color curve adjustments. Instead, it focuses on offering a flexible and customizable toolset for color grading within the ComfyUI environment.

What's New with ComfyUI-Olm-CurveEditor

• Version 1.0.1.1: This update ensures compatibility with ComfyUI frontend version 1.24.4 and later by chaining original mouse event handlers to maintain subgraph header button functionality.
• Version 1.0.1: Introduced the "Reset All" feature, improved the scalability of the curve editor, enhanced curve rendering, and included code refactoring for better performance.
• Version 1.0.0: The initial release of the extension, providing the foundational features for color curve editing.

Troubleshooting ComfyUI-Olm-CurveEditor

If you encounter issues while using the ComfyUI-Olm-CurveEditor, here are some common problems and solutions:

• Problem: The curve editor is not responding or displaying incorrectly.
• Solution: Ensure that you are using a compatible version of ComfyUI. Restart ComfyUI to reload the extension.
• Problem: Unable to add or remove points on the curve.
• Solution: Make sure you are using the correct mouse actions: left-click to add, drag to move, and shift-click to remove points.
• Problem: Presets are not appearing in the dropdown menu.
• Solution: Verify that your custom presets are saved in the curve_presets folder and that they are in the correct JSON format. Refresh the ComfyUI frontend to load new presets.

Learn More about ComfyUI-Olm-CurveEditor

To further explore the capabilities of the ComfyUI-Olm-CurveEditor, you can visit the GitHub repository for additional documentation and updates. For community support and discussions, consider joining forums or groups related to ComfyUI, where you can share your experiences and learn from other AI artists.