AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2008.11.21 16:50 "[Tiff] 24 bit Color to 8 bit Palettized Conversion Utility (tiffcp enhancement/variation?)", by Kevin Myers
2008.11.21 17:29 "Re: [Tiff] 24 bit Color to 8 bit Palettized Conversion Utility (tiffcp enhancement/variation?)", by Frank Warmerdam
2008.11.21 18:49 "Re: [Tiff] 24 bit Color to 8 bit Palettized Conversion Utility (tiffcp enhancement/variation?)", by Bob Friesenhahn
2008.11.21 19:11 "Re: [Tiff] 24 bit Color to 8 bit Palettized Conversion Utility (tiffcp enhancement/variation?)", by Bob Friesenhahn
2008.11.21 19:37 "Re: [Tiff] 24 bit Color to 8 bit Palettized Conversion Utility (tiffcp enhancement/variation?)", by Kevin Myers
2008.11.21 21:27 "[Tiff] Re: RGB to palette images", by Richard Nolde
2008.11.21 21:45 "Re: [Tiff] Re: RGB to palette images", by Kevin Myers
2008.11.21 21:56 "Re: [Tiff] Re: RGB to palette images", by Bob Friesenhahn
2008.11.21 22:12 "Re: [Tiff] Re: RGB to palette images", by Toby Thain
2008.11.21 23:51 "Re: [Tiff] Re: RGB to palette images", by Kevin Myers
2008.11.21 21:54 "Re: [Tiff] Re: RGB to palette images", by Frank Warmerdam
2008.11.21 22:24 "Re: [Tiff] Re: RGB to palette images", by Bob Friesenhahn
2008.11.21 22:46 "Re: [Tiff] Re: RGB to palette images", by Kevin Myers

2008.11.21 18:49 "Re: [Tiff] 24 bit Color to 8 bit Palettized Conversion Utility (tiffcp enhancement/variation?)", by Bob Friesenhahn

I'm looking for a command line utility with a version that runs under Windows which can convert a 24 bit color TIFF image to an 8 bit palettized TIFF image. But I need something that works similar to tiffcp that does the processing without loading the whole image into memory at once. I am aware of the very useful GraphicsMagick and ImageMagick utilities, but they both load the whole image into memory, which can be quite slow and somewhat problematic for some of the extremely large images that I work with.

Did you try VIPS? VIPS is able to accomplish many things without loading the whole image into memory and it is usually quite fast. I don't know if its color reduction works without loading the whole image though since that would require a several-pass algorithm.

   http://www.vips.ecs.soton.ac.uk/index.php?title=VIPS

VIPS usage is more arcane than ImageMagick or GraphicsMagick, but it does succeed where other software falters.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/