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November 2005

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

2005.11.03 15:44 "Re: Writing bilevel and transparent TIFFs efficiently", by Bob Friesenhahn

2005.11.03 17:06 "Re: Writing bilevel and transparent TIFFs efficiently", by Frank Warmerdam

2005.11.07 19:16 "Re: Writing bilevel and transparent TIFFs efficiently", by Joris Van Damme

2005.11.07 20:31 "Re: Writing bilevel and transparent TIFFs efficiently", by Bob Friesenhahn

2005.11.07 21:09 "Re: Writing bilevel and transparent TIFFs efficiently", by Joris Van Damme

2005.11.03 15:53 "Re: Writing bilevel and transparent TIFFs efficiently", by Gerben Vos

2005.11.02 16:58 "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