Specifies TIFF photometric interpretations. Used with TIFF PHOTOMETRIC control parameter.
| 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. |
See TIFF 6 specification for more information.