Constrain Image Node Documentation

Overview

The Constrain Image node in the ComfyUI-Custom-Scripts repository provides functionality to resize an image to specified maximum and minimum dimensions while maintaining the image's aspect ratio. This process can include optional cropping if needed to fully conform to the provided size constraints. This allows users to ensure that images fit specific dimension requirements without distorting their proportions.

Inputs

The Constrain Image node requires several inputs to function properly:

1. Images: A set of images that need to be resized.
2. Max Width: The maximum width for the output image.
3. Max Height: The maximum height for the output image.
4. Min Width: The minimum width for the output image.
5. Min Height: The minimum height for the output image.
6. Crop if Required: A choice between "yes" or "no" which dictates whether the image should be cropped to meet dimensions if necessary.

Outputs

The output from the Constrain Image node is a set of resized images that adhere to the specified maximum and minimum dimensions, with the aspect ratio maintained and optional cropping applied if necessary.

Usage in ComfyUI Workflows

In ComfyUI workflows, the Constrain Image node can be utilized to adjust image sizes to fit specific display or storage requirements. This can be particularly useful when working with a variety of image inputs that need to be standardized in size before further processing or displaying within an application. By setting the maximum width and height, along with the minimum dimensions, users can ensure visual consistency across different images.

Example Workflow

• Image Input: Feed multiple images into the node.
• Set Dimensions: Define the maximum and minimum width and height values based on your design requirements.
• Choose Cropping Option: Select whether or not the image should be cropped to fit within the specified limits.
• Output Handling: Use the resized images in subsequent nodes or within your application as needed.

Special Features and Considerations

• Aspect Ratio Maintenance: Regardless of the resizing, this node ensures that the original aspect ratio of the image is preserved. This prevents distortion.
• Optional Cropping: The node includes an option to crop images if they do not naturally fit within the specified maximum dimensions. This feature is helpful when an exact fit is necessary.
• Automatic Adjustment: The node automatically determines whether to stretch or crop based on the provided dimensions and options, making it user-friendly.

The Constrain Image node is a powerful tool in any image processing pipeline within ComfyUI, providing flexibility and control over the dimensions of image outputs without compromising the visual integrity of the images.