ComfyUI Node: Image Scale Down

Image Scale Down:

The easy imageScaleDown node is designed to help you reduce the size of your images efficiently while maintaining quality. This node is particularly useful when you need to downscale images to fit specific dimensions or reduce their resolution for various applications, such as web usage or creating thumbnails. By leveraging advanced downscaling methods, this node ensures that the visual integrity of your images is preserved, even when significantly reducing their size. The node offers a range of downscaling methods to choose from, allowing you to select the one that best suits your needs. Whether you are looking to quickly downscale an image for a preview or need precise control over the downscaling process, this node provides the flexibility and ease of use required for both simple and complex tasks.

Image Scale Down Input Parameters:

image

This parameter represents the input image that you want to downscale. It accepts an image file in various formats and serves as the primary source for the downscaling process.

downscale_method

This parameter allows you to choose the method used for downscaling the image. The available options include "nearest-exact", "bilinear", "area", "bicubic", and "lanczos". Each method has its own characteristics: "nearest-exact" is fast but may produce blocky results, "bilinear" and "bicubic" offer smoother results, "area" is good for reducing images with minimal artifacts, and "lanczos" provides high-quality downscaling with sharp details. The default value is "bicubic".

downscale_factor

This parameter determines the factor by which the image will be downscaled. It is a floating-point value that specifies the ratio of the new dimensions to the original dimensions. For example, a downscale factor of 0.5 will reduce the image dimensions by half. The value should be greater than 0 and less than or equal to 1.0.

crop

This parameter specifies whether the image should be cropped after downscaling. The available options are "disabled" and "center". When set to "center", the image will be cropped to maintain the aspect ratio, focusing on the center of the image. The default value is "disabled".

Image Scale Down Output Parameters:

IMAGE

The output parameter is the downscaled image. This image retains the visual quality as much as possible while being reduced in size according to the specified downscale method and factor. The output can be used directly in your projects or further processed as needed.

Image Scale Down Usage Tips:

• For quick downscaling with minimal quality loss, use the "bilinear" or "bicubic" methods.
• If you need to maintain sharp details in the downscaled image, consider using the "lanczos" method.
• When downscaling images for web use, a downscale factor between 0.5 and 0.75 often provides a good balance between size reduction and quality.
• Use the "center" crop option if you need to maintain the aspect ratio and focus on the central part of the image.

Image Scale Down Common Errors and Solutions:

"Invalid downscale factor"

• Explanation: The downscale factor provided is either less than or equal to 0 or greater than 1.0.
• Solution: Ensure that the downscale factor is a positive floating-point number greater than 0 and less than or equal to 1.0.

"Unsupported downscale method"

• Explanation: The downscale method specified is not one of the supported methods.
• Solution: Choose a downscale method from the available options: "nearest-exact", "bilinear", "area", "bicubic", or "lanczos".

"Image input is not valid"

• Explanation: The input provided is not a valid image file.
• Solution: Verify that the input is a valid image file in a supported format and try again.