ComfyUI Node: Frequency Combination HSV Node

Frequency Combination HSV Node:

The FrequencyCombinationHSV node is designed to merge high-frequency and low-frequency components of images using the HSV (Hue, Saturation, Value) color space. This node is particularly useful for AI artists who want to blend different frequency details of images to achieve specific visual effects. By focusing on the Value channel in the HSV color space, this node allows for precise control over the brightness and contrast of the combined image, resulting in a more natural and visually appealing output. The main goal of this node is to provide a seamless way to recombine images that have been separated into high and low-frequency components, ensuring that the final image retains the desired details and overall appearance.

Frequency Combination HSV Node Input Parameters:

high_freq

The high_freq parameter represents the high-frequency component of the image, which contains the fine details and textures. This input should be an image tensor with the shape (batch, height, width, channels). The high-frequency component is typically obtained through a frequency separation process and is crucial for preserving the intricate details in the final combined image.

low_freq

The low_freq parameter represents the low-frequency component of the image, which contains the overall color and lighting information. This input should also be an image tensor with the shape (batch, height, width, channels). The low-frequency component is essential for maintaining the general appearance and color balance of the final combined image.

Frequency Combination HSV Node Output Parameters:

IMAGE

The output parameter is an image tensor that represents the combined result of the high-frequency and low-frequency components. This combined image retains the fine details from the high-frequency input while preserving the overall color and lighting from the low-frequency input. The output tensor has the shape (batch, height, width, channels) and is ready for further processing or display.

Frequency Combination HSV Node Usage Tips:

• Ensure that both high_freq and low_freq inputs have the same dimensions to avoid any shape mismatch errors.
• Use this node after a frequency separation process to recombine the separated components effectively.
• Experiment with different high and low-frequency inputs to achieve various artistic effects, such as enhancing textures or balancing lighting.

Frequency Combination HSV Node Common Errors and Solutions:

Low frequency image at index {i} does not have 3 channels

• Explanation: This error occurs when the low-frequency image does not have exactly 3 channels (RGB).
• Solution: Ensure that the low-frequency image input has 3 channels before passing it to the node.

Shape mismatch between high_freq and low_freq inputs

• Explanation: This error occurs when the dimensions of the high-frequency and low-frequency inputs do not match.
• Solution: Verify that both inputs have the same shape (batch, height, width, channels) before using the node.

Invalid value range in high_freq or low_freq inputs

• Explanation: This error occurs when the values in the high-frequency or low-frequency inputs are outside the expected range (0 to 1).
• Solution: Normalize the input values to ensure they are within the range of 0 to 1 before passing them to the node.