This enumeration specifies the Reduction Method the Source should use to reduce the bit depth of the data.
Values:
IG_TW_BR_CUSTHALFTONE |
Custom Halftone method. |
IG_TW_BR_DIFFUSION |
Diffusion method. |
IG_TW_BR_HALFTONE |
Halftone method. |
IG_TW_BR_THRESHOLD |
Threshold method. |