Chromaticities of the image's primary colors. 0x013F ∙ 319
IG_ISIS_TAG_PRIMARYCHROMATICITIES specifies the chromaticity of the primaries of the image.
IG_ISIS_TAG_TYPE_RATIONAL
None
An array of six rational value specifying the x and y chromaticities of red, green, and blue.
Refer to the TIFF specification.