ComfyUI Node: Nuke Grade

Nuke Grade:

The NukeGrade node is a professional color grading tool designed to enhance and adjust the visual quality of images by manipulating their color properties. It offers a comprehensive set of controls similar to those found in Nuke's Grade node, allowing you to fine-tune the lift, gamma, and gain of an image. These adjustments enable you to correct color imbalances, enhance contrast, and achieve a desired aesthetic effect. The node is particularly beneficial for artists looking to refine the mood and tone of their images, providing a high level of control over the color grading process. By using the NukeGrade node, you can ensure that your images have the perfect balance of colors, making them visually appealing and professionally polished.

Nuke Grade Input Parameters:

image

The image parameter is the primary input for the NukeGrade node, representing the image that you wish to color grade. This parameter is crucial as it serves as the base upon which all color adjustments will be applied. The image should be in a compatible format that the node can process, typically a standard image file used in digital art and design.

lift

The lift parameter adjusts the shadows or darker areas of the image. By modifying this parameter, you can either darken or lighten the shadows, which can help in setting the overall mood of the image. The lift parameter typically ranges from negative to positive values, with a default value that maintains the original shadow levels.

lift_r_offset

The lift_r_offset parameter specifically targets the red channel in the shadows, allowing you to adjust the red tones independently. This can be useful for correcting color casts or achieving a specific color balance in the darker areas of the image.

lift_g_offset

Similar to lift_r_offset, the lift_g_offset parameter adjusts the green channel in the shadows. This parameter helps in fine-tuning the green tones, which can be essential for achieving a natural look or correcting green color imbalances.

lift_b_offset

The lift_b_offset parameter allows you to adjust the blue channel in the shadows. By modifying this parameter, you can control the blue tones in the darker areas, which is useful for correcting blue color casts or achieving a cooler or warmer look.

gamma

The gamma parameter affects the midtones of the image, allowing you to adjust the brightness and contrast in these areas. This parameter is crucial for achieving a balanced look, as it can enhance details and improve the overall visual quality of the image. The gamma parameter typically ranges from values that darken to those that lighten the midtones.

gamma_r_offset

The gamma_r_offset parameter targets the red channel in the midtones, providing control over the red tones in these areas. This can be useful for achieving a specific color balance or correcting red color imbalances in the midtones.

gamma_g_offset

The gamma_g_offset parameter allows you to adjust the green channel in the midtones. By modifying this parameter, you can fine-tune the green tones, which can be essential for achieving a natural look or correcting green color imbalances.

gamma_b_offset

The gamma_b_offset parameter adjusts the blue channel in the midtones, providing control over the blue tones in these areas. This is useful for correcting blue color casts or achieving a cooler or warmer look in the midtones.

gain

The gain parameter affects the highlights or brighter areas of the image. By adjusting this parameter, you can either increase or decrease the brightness of the highlights, which can help in enhancing the overall contrast and visual impact of the image. The gain parameter typically ranges from values that darken to those that lighten the highlights.

gain_r_offset

The gain_r_offset parameter specifically targets the red channel in the highlights, allowing you to adjust the red tones independently. This can be useful for correcting color casts or achieving a specific color balance in the brighter areas of the image.

gain_g_offset

Similar to gain_r_offset, the gain_g_offset parameter adjusts the green channel in the highlights. This parameter helps in fine-tuning the green tones, which can be essential for achieving a natural look or correcting green color imbalances.

gain_b_offset

The gain_b_offset parameter allows you to adjust the blue channel in the highlights. By modifying this parameter, you can control the blue tones in the brighter areas, which is useful for correcting blue color casts or achieving a cooler or warmer look.

multiply

The multiply parameter is used to scale the overall brightness of the image. By adjusting this parameter, you can uniformly increase or decrease the brightness across all areas of the image, which can be useful for achieving a specific exposure level.

offset

The offset parameter adds a constant value to the image, effectively shifting the brightness of all pixels. This can be useful for making subtle adjustments to the overall exposure or for correcting minor brightness imbalances.

mask

The mask parameter is an optional input that allows you to specify a mask for the color grading adjustments. By using a mask, you can limit the effect of the color grading to specific areas of the image, providing greater control and precision in your adjustments.

Nuke Grade Output Parameters:

IMAGE

The IMAGE output parameter represents the color-graded image resulting from the adjustments made using the NukeGrade node. This output is the final product of the color grading process, reflecting all the changes applied to the lift, gamma, gain, and other parameters. The output image is typically in the same format as the input image, ready for further processing or final use in your projects.

Nuke Grade Usage Tips:

• Experiment with the lift, gamma, and gain parameters to achieve the desired mood and tone for your image. These controls are powerful tools for enhancing contrast and color balance.
• Use the channel-specific offset parameters to correct color imbalances or to create artistic effects by emphasizing certain colors in the shadows, midtones, or highlights.
• Consider using a mask to apply color grading selectively to specific areas of your image, allowing for more targeted adjustments and creative effects.

Nuke Grade Common Errors and Solutions:

"Invalid image format"

• Explanation: The input image is not in a supported format for the NukeGrade node.
• Solution: Ensure that the input image is in a compatible format, such as a standard image file used in digital art and design.

"Parameter out of range"

• Explanation: One or more parameters have been set to values outside their acceptable range.
• Solution: Check the values of all parameters and ensure they are within the specified range for each parameter. Adjust any values that are too high or too low.

"Mask not applied"

• Explanation: The mask parameter is not correctly set, or the mask image is not compatible.
• Solution: Verify that the mask is correctly specified and that it is in a compatible format. Ensure that the mask is properly aligned with the input image.