|Extension TIFF Tag PrimaryChromaticities|
TIFF Tag Reference
TIFF Tag PrimaryChromaticities
The chromaticities of the primaries of the image.
This is the chromaticity for each of the primaries when it has its ReferenceWhite value and the other primaries have their ReferenceBlack values. These values are described using the 1931 CIE xy chromaticity diagram and only the chromaticities are specified. These values can correspond to the chromaticities of the phosphors of a monitor, the filter set and light source combination of a scanner or the imaging model of a rendering package. The ordering is red[x], red[y], green[x], green[y], blue[x], and blue[y].
For example the CCIR Recommendation 709 primaries are: