Specifies TIFF photometric interpretations. Used with TIFF PHOTOMETRIC control parameter.

Values:

IG_TIF_PHOTO_WHITEZERO	Indicates that zero 0 pixel value represents white color.
IG_TIF_PHOTO_BLACKZERO	Indicates that zero 0 pixel value represents black color.
IG_TIF_PHOTO_RGB	Indicates RGB colorspace.
IG_TIF_PHOTO_PALETTE	Indicates indexed colors image with RGB palette.
IG_TIF_PHOTO_TRANSPARENCY	Indicates transparency mask.
IG_TIF_PHOTO_CMYK	Indicates CMYK colorspace.
IG_TIF_PHOTO_YCBCR	Indicates YCBCR colorspace.
IG_TIF_PHOTO_CIELAB	Indicates CIELAB colorspace.

Remarks:

See TIFF 6 specification for more information.