ComfyUI Node: Iterative Upscale (Latent/on Pixel Space)

Iterative Upscale (Latent/on Pixel Space):

The IterativeLatentUpscale node is designed to progressively upscale latent images through multiple steps, ensuring high-quality results by leveraging iterative scaling techniques. This node is particularly useful for AI artists who need to enhance the resolution of their latent images while maintaining the integrity and details of the original content. By breaking down the upscaling process into smaller, manageable steps, IterativeLatentUpscale minimizes artifacts and produces smoother, more refined images. This method is beneficial for achieving precise control over the upscaling process, allowing for both geometric and simple step modes to cater to different artistic needs and preferences.

Iterative Upscale (Latent/on Pixel Space) Input Parameters:

samples

This parameter represents the latent image data that you want to upscale. It is the core input for the node and contains the initial image information in a latent space format.

upscale_factor

This parameter determines the overall scaling factor by which the image will be upscaled. It is a floating-point value with a default of 1.5, a minimum of 0.01, and a maximum of 8.0. Adjusting this value will directly impact the final resolution of the upscaled image.

steps

This parameter specifies the number of iterative steps to perform during the upscaling process. More steps can lead to finer control and potentially higher quality results, but may also increase processing time.

step_mode

This parameter defines the method used for scaling in each step. It can be set to either "geometric" or "simple". The geometric mode scales the image by a consistent factor in each step, while the simple mode adds a fixed amount to the scale in each step.

temp_prefix

This optional parameter allows you to specify a prefix for saving temporary images during the upscaling process. If left empty, no temporary images will be saved.

unique_id

This parameter is used internally to track the status of the upscaling process. It helps in updating the node status and providing progress feedback.

Iterative Upscale (Latent/on Pixel Space) Output Parameters:

LATENT

The primary output of the node is the upscaled latent image. This output retains the enhanced resolution and details achieved through the iterative upscaling process, ready for further processing or final rendering.

Iterative Upscale (Latent/on Pixel Space) Usage Tips:

• For best results, use a higher number of steps to achieve smoother and more detailed upscaling.
• Experiment with both geometric and simple step modes to find the best method for your specific image and artistic style.
• Utilize the temp_prefix parameter to save intermediate results and monitor the progress of the upscaling process.

Iterative Upscale (Latent/on Pixel Space) Common Errors and Solutions:

"Invalid upscale factor"

• Explanation: The upscale factor provided is outside the acceptable range.
• Solution: Ensure that the upscale factor is between 0.01 and 8.0.

"Invalid number of steps"

• Explanation: The number of steps specified is not a positive integer.
• Solution: Set the steps parameter to a positive integer value to proceed with the upscaling process.

"Invalid step mode"

• Explanation: The step mode provided is not recognized.
• Solution: Use either "geometric" or "simple" as the step mode to ensure proper functioning of the node.