ComfyUI Node: ImageScaleFactor _O

ImageScaleFactor _O:

The ImageScaleFactor _O node is designed to upscale images by independently adjusting their width and height based on specified scaling factors. This node provides a flexible and efficient way to enhance image resolution, making it particularly useful for AI artists looking to improve the quality and detail of their images. By offering multiple upscale methods and cropping options, it ensures that the upscaling process can be tailored to meet specific artistic needs. The node also includes a toggle to enforce scaling factors that are multiples of 4 or 6, which can be beneficial for maintaining certain image properties.

ImageScaleFactor _O Input Parameters:

image

This parameter represents the input image that you want to upscale. It is the primary data that the node processes to produce a higher resolution output.

upscale_method

This parameter allows you to choose the method used for upscaling the image. The available options are "nearest-exact", "bilinear", and "area". Each method has its own characteristics: "nearest-exact" is fast and simple but may produce blocky results, "bilinear" offers smoother transitions but can blur details, and "area" is a compromise between speed and quality.

WidthFactor

This parameter specifies the factor by which the width of the image will be scaled. It accepts a floating-point value with a default of 1.25, a minimum of 0.0, and a maximum of 10.0. Adjusting this factor allows you to control the horizontal scaling of the image.

HeightFactor

This parameter specifies the factor by which the height of the image will be scaled. Similar to WidthFactor, it accepts a floating-point value with a default of 1.25, a minimum of 0.0, and a maximum of 10.0. This allows you to control the vertical scaling of the image.

MulOf46

This toggle parameter determines whether the scaling factors should be enforced as multiples of 4 or 6. The options are "enabled" and "disabled", with the default being "enabled". Enabling this can help maintain certain image properties that are beneficial for further processing.

crop

This parameter specifies the cropping method to be used after upscaling. The available options are "disabled" and "center". "disabled" means no cropping will be applied, while "center" will crop the image to keep the central part, which can be useful for maintaining focus on the main subject.

ImageScaleFactor _O Output Parameters:

IMAGE

The output of this node is the upscaled image. This image will have its width and height adjusted according to the specified scaling factors and will be processed using the chosen upscaling method and cropping option. The result is a higher resolution image that retains the desired properties and details.

ImageScaleFactor _O Usage Tips:

• To achieve the best quality, experiment with different upscale methods to see which one works best for your specific image.
• Use the MulOf46 toggle to ensure that the scaling factors are multiples of 4 or 6, which can be particularly useful if the image will undergo further processing.
• If the main subject of your image is centered, using the "center" crop method can help maintain focus on the subject after upscaling.

ImageScaleFactor _O Common Errors and Solutions:

Invalid upscale method

• Explanation: This error occurs if an unsupported upscale method is selected.
• Solution: Ensure that the upscale method is one of the following: "nearest-exact", "bilinear", or "area".

Scaling factor out of range

• Explanation: This error occurs if the WidthFactor or HeightFactor is set outside the allowed range (0.0 to 10.0).
• Solution: Adjust the scaling factors to be within the specified range.

Image not provided

• Explanation: This error occurs if no image is provided as input.
• Solution: Ensure that an image is connected to the input parameter before executing the node.