AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2005.11.02 16:58 "[Tiff] Writing bilevel and transparent TIFFs efficiently", by Rupali Holmes
2005.11.03 15:44 "Re: [Tiff] Writing bilevel and transparent TIFFs efficiently", by Bob Friesenhahn
2005.11.03 17:06 "Re: [Tiff] Writing bilevel and transparent TIFFs efficiently", by Frank Warmerdam
2005.11.07 19:16 "Re: [Tiff] Writing bilevel and transparent TIFFs efficiently", by Joris
2005.11.07 20:31 "Re: [Tiff] Writing bilevel and transparent TIFFs efficiently", by Bob Friesenhahn
2005.11.07 21:09 "Re: [Tiff] Writing bilevel and transparent TIFFs efficiently", by Joris
2005.11.03 15:53 "Re: [Tiff] Writing bilevel and transparent TIFFs efficiently", by Gerben Vos

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