AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2004.09.01 20:39 "[Tiff] Stacked tiffs with colourmaps", by David Scriven
2004.09.02 01:27 "Re: [Tiff] Stacked tiffs with colourmaps", by Joris
2004.09.02 01:44 "Re: [Tiff] Stacked tiffs with colourmaps", by Chris Cox
2004.09.02 16:22 "Re: [Tiff] Stacked tiffs with colourmaps", by Ross A. Finlayson
2004.09.02 17:08 "Re: [Tiff] Stacked tiffs with colourmaps", by Bob Friesenhahn
2004.09.02 18:12 "Re: [Tiff] 16bit compressed colormaps", by Joris
2004.09.21 16:16 "Re: [Tiff] Alias Sketchbook Multi-Layer Tiff Files -- Specification", by Ian Ameline
2004.09.20 21:30 "[Tiff] Alias Sketchbook Multi-Layer Tiff Files -- Specification", by Ian Ameline
2004.09.21 16:01 "Re: [Tiff] Alias Sketchbook Multi-Layer Tiff Files -- Specification", by Joris
2004.09.27 19:14 "Re: [Tiff] Alias Sketchbook Multi-Layer Tiff Files -- Specification", by Ian Ameline
2004.09.27 19:34 "Re: [Tiff] Alias Sketchbook Multi-Layer Tiff Files -- Specification", by Joris
2004.09.24 13:02 "Re: [Tiff] Alias Sketchbook Multi-Layer Tiff Files -- Specification", by Joris
2004.09.24 12:36 "[Tiff] Possible (tiny) bug in LZW code", by Joris
2004.09.24 13:30 "Re: [Tiff] Possible (tiny) bug in LZW code", by Joris

2004.09.02 01:44 "Re: [Tiff] Stacked tiffs with colourmaps", by Chris Cox

*But* if you are very sure that your files will not escape into the wild, and will not get edited by TIFF page-joggling or other tools, you could nevertheless write the color map only once, and state the same color map offset in all IFD's. That is *not legal* in TIFF 6.0, but it takes some analysis to detect even, so normal readers would not have any problems with the file. Neither would transcoders. Only apps that, for instance, delete pages and try to reuse lost memory writing other data into it and such, would cause problems.

That actually would work in most TIFF readers.

Chris