ComfyUI Node: ProPostRadialBlur

ProPostRadialBlur:

The ProPostRadialBlur node is designed to apply a radial blur effect to images, creating a visually appealing focus that radiates from a specified center point. This effect is particularly useful for drawing attention to a central subject while gradually blurring the surrounding areas, mimicking the natural blur seen in photography. The node leverages advanced algorithms to generate a smooth transition from sharp to blurred regions, ensuring a high-quality and realistic output. By adjusting various parameters, you can control the intensity, spread, and precision of the blur effect, making it a versatile tool for enhancing the visual impact of your images.

ProPostRadialBlur Input Parameters:

image

This parameter represents the input image to which the radial blur effect will be applied. It should be a tensor of shape (batch_size, height, width, channels), where each pixel value is normalized between 0 and 1.

blur_strength

Represents the blur strength. This parameter controls the overall intensity of the blur effect; the higher the value, the more blurred the image becomes. Typical values range from 0.0 (no blur) to 1.0 (maximum blur).

center_x

This parameter specifies the x-coordinate of the center point from which the radial blur effect will radiate. It is a float value between 0.0 and 1.0, representing the relative position within the image width.

center_y

This parameter specifies the y-coordinate of the center point from which the radial blur effect will radiate. It is a float value between 0.0 and 1.0, representing the relative position within the image height.

focus_spread

Represents the focus spread range. This parameter controls the size of the blur transition area near the focal point; the larger the value, the wider the transition area, and the smoother the blur effect spreads around the focus. Typical values range from 0.0 to 1.0.

steps

Represents the number of steps in the blur process. This parameter determines the calculation precision of the blur effect; the more steps, the finer the blur effect, but this also increases the computational load. Typical values range from 1 to 100.

ProPostRadialBlur Output Parameters:

result

This parameter is the output image tensor with the applied radial blur effect. It retains the same shape as the input image (batch_size, height, width, channels) and contains the processed image data.

ProPostRadialBlur Usage Tips:

• To achieve a subtle blur effect, start with a low blur_strength value (e.g., 0.1) and gradually increase it until the desired effect is achieved.
• Adjust the center_x and center_y parameters to position the focal point precisely on the subject you want to highlight.
• Use a higher focus_spread value to create a smoother transition between the sharp and blurred areas, which can enhance the natural look of the effect.
• Increase the steps parameter for a more refined blur effect, especially when working with high-resolution images, but be mindful of the increased computational load.

ProPostRadialBlur Common Errors and Solutions:

"Input image tensor shape mismatch"

• Explanation: The input image tensor does not have the expected shape (batch_size, height, width, channels).
• Solution: Ensure that the input image tensor is correctly formatted and normalized between 0 and 1.

"Invalid blur_strength value"

• Explanation: The blur_strength parameter is outside the acceptable range.
• Solution: Set the blur_strength parameter to a value between 0.0 and 1.0.

"Invalid center_x or center_y value"

• Explanation: The center_x or center_y parameter is outside the range of 0.0 to 1.0.
• Solution: Ensure that both center_x and center_y are set to values within the range of 0.0 to 1.0.

"Excessive computational load"

• Explanation: The steps parameter is set too high, causing performance issues.
• Solution: Reduce the steps parameter to a more manageable value, balancing between effect precision and computational efficiency.