ComfyUI Node: ImageCropByRatioAndResize

ImageCropByRatioAndResize:

The ImageCropByRatioAndResize node is designed to help you crop an image to a specific aspect ratio and then resize it to desired dimensions. This node is particularly useful when you need to ensure that your images fit a particular size or aspect ratio, which is often required for various artistic and design purposes. By automatically calculating the necessary crop dimensions based on the provided width and height ratios, this node simplifies the process of preparing images for different formats and resolutions. Additionally, it offers various interpolation methods to ensure the resized image maintains high quality.

ImageCropByRatioAndResize Input Parameters:

image

This parameter takes the input image that you want to crop and resize. The image should be in a format that the node can process, typically a tensor or array representing the image data.

width_ratio_size

This parameter specifies the target width ratio for cropping the image. It determines the width of the cropped area relative to the height. The value should be a positive integer.

height_ratio_size

This parameter specifies the target height ratio for cropping the image. It determines the height of the cropped area relative to the width. The value should be a positive integer.

position

This parameter allows you to specify the position of the crop. Options include "top", "bottom", "left", "right", and "center". This helps you control which part of the image is retained after cropping.

interpolation

This parameter determines the method used for resizing the image after cropping. Options include "nearest-exact", "bilinear", "area", "bicubic", and "lanczos". Each method offers different trade-offs between speed and quality.

ImageCropByRatioAndResize Output Parameters:

image

The output image is the cropped and resized version of the input image. It retains the specified aspect ratio and dimensions, making it suitable for your intended use.

width

This output parameter provides the width of the resized image. It helps you verify that the image has been resized to the correct dimensions.

height

This output parameter provides the height of the resized image. It helps you verify that the image has been resized to the correct dimensions.

ImageCropByRatioAndResize Usage Tips:

• To maintain the highest quality, use the "lanczos" interpolation method, especially for significant resizing.
• When cropping portraits, use the "center" position to ensure the main subject remains in focus.
• Experiment with different width and height ratios to find the best fit for your specific needs.

ImageCropByRatioAndResize Common Errors and Solutions:

"Invalid image format"

• Explanation: The input image is not in a supported format.
• Solution: Ensure the image is in a compatible format, such as a tensor or array.

"Width or height ratio is zero or negative"

• Explanation: The width_ratio_size or height_ratio_size parameter is set to an invalid value.
• Solution: Set both width_ratio_size and height_ratio_size to positive integers.

"Invalid position value"

• Explanation: The position parameter is set to an unsupported value.
• Solution: Use one of the supported position values: "top", "bottom", "left", "right", or "center".

"Interpolation method not supported"

• Explanation: The interpolation parameter is set to an unsupported method.
• Solution: Use one of the supported interpolation methods: "nearest-exact", "bilinear", "area", "bicubic", or "lanczos".