2006.01.07 01:11 "Re: [Tiff] LZW in libtiff 3.7.2", by Bob Friesenhahn
On Fri, 6 Jan 2006, Monee wrote:
I am using libtiff version 3.7.2 and test images from ftp://ftp.remotesensing.org/pub/libtiff/pics-3.8.0.tar.gz on windows platform.
When I try to read an LZW compressed image(oxford.tif from the test image set) using TIFFReadRGBAImage function, I get error "requested compression is not configured". However, in TiffConf.h there is a macro defined for LZW support and a query on Compression Tag field returns LZW type compression. How can I configure LZW compression and be able to read LZW and other compressed type files? With libtiff version I am using I can only read tiff files with no compression.
After two posts with no immediate response you may be feeling ignored. :-)
Using the default configuration (using *.vc files in libtiff directory) I am not seeing any such problems with my own software which is using a slightly patched libtiff 3.8.0.
Only zackthecat.tif reports a problem with unsupported compression, and that is expected since it uses OJPEG format.
There may be something wrong with your libtiff build, or it may also be that some older libtiff (DLL) on your system is being used by accident.
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/