comfyui-find-perfect-resolution

This custom ComfyUI node, Find Perfect Resolution, calculates an optimal output resolution for an input image while preserving its aspect ratio and ensuring dimensions are divisible by a specified value. It is designed to work seamlessly in ComfyUI workflows, particularly for resizing images with nodes like "Resize Image v2".

Features

Input:

Accepts an image (from a "Load Image" node) to determine the original dimensions and aspect ratio.

User Parameters:

• desired_width and desired_height: Target resolution set by the user (default: 512x512, range: 64–4096).
• divisible_by: Ensures output dimensions are divisible by this value (default: 16, range: 1–64).

Output:

Returns two integers (width, height) representing the calculated resolution, maintaining the original aspect ratio and adhering to the divisible_by constraint.

Logic:

• Computes the target pixel count from the desired width and height.
• Calculates the new height using: round(sqrt((target_pixels * orig_height) / orig_width) / divisible_by) * divisible_by.
• Calculates the new width using: round((orig_width / orig_height) * sqrt((target_pixels * orig_height) / orig_width) / divisible_by) * divisible_by.

Category:

Listed under "utils" in ComfyUI's node menu.

Use Case

Ideal for workflows requiring precise image resizing while maintaining aspect ratio and ensuring dimensions meet specific divisibility requirements (e.g., for compatibility with H.264 encoding or other processing constraints).Installation

• Place the FindPerfectResolution folder in ComfyUI/custom_nodes/.
• Restart ComfyUI to load the node.
• Find the node under the "utils" category and connect it to your workflow.

Example Workflow

• Connect a "Load Image" node to the image input.
• Set desired_width, desired_height, and divisible_by as needed.
• Use the output width and height in a "Resize Image v2" node for further processing.

Greetings to #Verole for the logical behind the scene.