|On this page|
Output a grayscale image containing the luminance of the incoming RGB color in all color channels; the alpha channel is left unchanged if present. Computed using the dot product of the incoming color with the luma coefficients of the active CMS configuration.
The luma coefficients of the current working color space; if no specific color space can be determined, the ACEScg (ap1) luma coefficients /nodes/vop/0.2722287, 0.6740818, 0.0536895 will be used. Applications which support color management systems may choose to retrieve this value from the CMS to pass to the <luminance> node’s implementation directly, rather than exposing it to the user.