2005.11.02 16:58 "[Tiff] Writing bilevel and transparent TIFFs efficiently", by Rupali Holmes

Hi,

I'm trying to write a bilevel image as a transparent TIFF. So one of the colors is always transparent, and the other is opaque. What is the best way to do this? I can't use G3 or G4 because the colors are not necessarily black and white. The one option I see is to write an RGB image with an associated alpha but that doesn't seem very efficient. Is there a better way to do this? What type of compression should be used?

Thanks,

Rupali