◎ Radiance ACES 2.0 Output:
The RadianceACES2OutputTransform node is designed to apply the ACES 2.0 Output Transform, which is essential for delivering high-quality images suitable for both Standard Dynamic Range (SDR) and High Dynamic Range (HDR) displays, as well as cinema outputs. This node is particularly beneficial for AI artists and professionals who require precise color management and gamut mapping in their workflows. By leveraging the ACES 2.0 standard, this node ensures that images are accurately transformed to match the intended display characteristics, providing improved gamut mapping and tone mapping capabilities. The node's primary goal is to facilitate the conversion of images into various color spaces and dynamic ranges, ensuring that the final output maintains the artistic intent and visual fidelity across different viewing environments.
◎ Radiance ACES 2.0 Output Input Parameters:
image
This parameter represents the input image that you want to transform. It is typically provided as a tensor, which is a multi-dimensional array used to store image data. The image serves as the starting point for the transformation process, and its quality and characteristics will directly impact the final output.
display_target
The display target parameter specifies the intended display environment for the output image. It determines the color space and dynamic range to which the image will be transformed. Options include "sRGB" for standard displays, "P3-D65" for cinema displays, and "Rec.2100" for HDR displays. Choosing the correct display target ensures that the image is optimized for the intended viewing conditions.
peak_luminance
Peak luminance defines the maximum brightness level for the HDR output. It is measured in nits and is crucial for ensuring that the image's highlights are accurately represented on HDR displays. Typical values range from 1000 to 4000 nits, depending on the display capabilities and artistic intent.
contrast
This parameter controls the contrast level applied during the tone mapping process. Adjusting the contrast can enhance the visual depth and detail of the image, making it more visually appealing. The contrast setting should be chosen based on the desired artistic effect and the characteristics of the input image.
gamut_compress
Gamut compress is a boolean parameter that determines whether gamut compression should be applied. When enabled, it helps to prevent colors from exceeding the display's color gamut, ensuring that the image remains visually accurate and free from artifacts. This is particularly useful when working with wide-gamut images.
gamut_threshold
The gamut threshold parameter sets the level at which gamut compression is applied. It is a floating-point value typically ranging from 0.0 to 1.0, with higher values resulting in more aggressive compression. Adjusting this threshold allows for fine-tuning of the gamut compression process to achieve the desired balance between color accuracy and visual impact.
◎ Radiance ACES 2.0 Output Output Parameters:
output_image
The output image is the transformed version of the input image, adjusted according to the specified display target, peak luminance, contrast, and other parameters. It is returned as a tensor, ready for display or further processing. This output ensures that the image is optimized for the intended viewing environment, maintaining the desired visual quality and artistic intent.
transform_info
Transform info provides additional information about the transformation process, including details about the applied color space and dynamic range adjustments. This information can be useful for debugging or for understanding the specific changes made to the image during the transformation.
◎ Radiance ACES 2.0 Output Usage Tips:
- Ensure that the display target matches the intended viewing environment to achieve optimal color accuracy and visual quality.
- Adjust the peak luminance and contrast settings to enhance the image's visual appeal while maintaining the desired artistic intent.
- Enable gamut compression when working with wide-gamut images to prevent color artifacts and ensure accurate color representation.
◎ Radiance ACES 2.0 Output Common Errors and Solutions:
"Invalid display target specified"
- Explanation: This error occurs when the display target parameter is set to an unsupported value.
- Solution: Verify that the display target is set to a valid option such as "sRGB", "P3-D65", or "Rec.2100".
"Peak luminance out of range"
- Explanation: The specified peak luminance value is outside the acceptable range for HDR displays.
- Solution: Ensure that the peak luminance is set within the typical range of 1000 to 4000 nits, depending on the display capabilities.
"Gamut threshold must be between 0.0 and 1.0"
- Explanation: The gamut threshold parameter is set to a value outside the valid range.
- Solution: Adjust the gamut threshold to a value between 0.0 and 1.0 to ensure proper gamut compression.