ComfyUI Node: Nuke Exposure

Nuke Exposure:

The NukeExposure node is designed to adjust the exposure of an image, replicating the functionality of Nuke's Exposure node. This node allows you to modify the brightness of an image by altering its exposure using different methods such as f-stops, printer lights, or film density units. By adjusting these parameters, you can achieve the desired lighting effect, enhancing the visual quality of your images. The node is particularly useful for fine-tuning the exposure to match specific artistic or technical requirements, providing a flexible and powerful tool for image manipulation.

Nuke Exposure Input Parameters:

image

This parameter represents the input image that you want to adjust. It is the primary source on which the exposure adjustments will be applied.

stops

The stops parameter controls the amount of exposure adjustment in terms of f-stops. A positive value increases the exposure, making the image brighter, while a negative value decreases it, making the image darker. The range is from -10.0 to 10.0, with a default value of 0.0.

exposure_type

This parameter allows you to choose the method of exposure adjustment. Options include "stops", "printer_lights", and "film_density". Each method has a different impact on how the exposure is calculated and applied to the image, with "stops" being the default option.

multiply

The multiply parameter is a scalar that multiplies the image's pixel values after the exposure adjustment. It ranges from 0.0 to 10.0, with a default value of 1.0, allowing you to further fine-tune the brightness of the image.

offset

This parameter adds a constant value to the image's pixel values after the exposure adjustment and multiplication. It ranges from -1.0 to 1.0, with a default value of 0.0, providing an additional level of control over the image's brightness.

clamp_output

The clamp_output parameter is a boolean that determines whether the output image's pixel values should be clamped between 0.0 and 1.0. This prevents pixel values from exceeding the typical range, which can help maintain image quality. The default setting is True.

mix

The mix parameter controls the blend between the original and the adjusted image. A value of 1.0 applies the full effect of the exposure adjustment, while a value of 0.0 leaves the image unchanged. The range is from 0.0 to 1.0, with a default value of 1.0.

mask

This optional parameter allows you to specify an image mask that determines where the exposure adjustment is applied. Areas covered by the mask will be affected by the exposure changes, while other areas will remain unchanged.

Nuke Exposure Output Parameters:

IMAGE

The output is an adjusted image with modified exposure based on the input parameters. This image reflects the changes made through the exposure adjustment process, providing a visually enhanced version of the original input.

Nuke Exposure Usage Tips:

• Use the stops parameter to quickly adjust the overall brightness of your image, especially when you need to make significant changes.
• Experiment with different exposure_type settings to see which method best suits your artistic vision or technical needs.

Nuke Exposure Common Errors and Solutions:

Image not found

• Explanation: This error occurs when the input image is not correctly specified or is missing.
• Solution: Ensure that the image parameter is correctly set with a valid image file.

Invalid exposure type

• Explanation: This error arises when an unsupported value is provided for the exposure_type parameter.
• Solution: Check that the exposure_type is set to one of the supported options: "stops", "printer_lights", or "film_density".