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August 2005

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2005.08.29 16:57 "libTIFF and ImageMagick - Windows binaries; Turning on support for JPEG compressed TIFFs; Alternatives (TIFFCP, TIFF2BW, etc.) for JPEG TIFFs", by <dave_roberts@farmfamily.com>
2005.08.29 18:00 "Re: libTIFF and ImageMagick - Windows binaries; Turning on support for JPEG compressed TIFFs; Alternatives (TIFFCP, TIFF2BW, etc.) for JPEG TIFFs", by Morten Bagai

2005.08.29 16:57 "libTIFF and ImageMagick - Windows binaries; Turning on support for JPEG compressed TIFFs; Alternatives (TIFFCP, TIFF2BW, etc.) for JPEG TIFFs", by <dave_roberts@farmfamily.com>

We use ImageMagick (which contains a copy of libTIFF) to process images of
various formats and compressions into either Group4 (B&W)TIFF or JPEGs
depending on content.  I got a "Sorry, Compression Method is Not
Configured" error message in ImageMagick for JPEG compressed TIFFs, so I
took a look at the source code distribution (for 6.2.4) for the Windows
build.

I noticed that in the "tifconf.h" header file that the JPEG support was
defined in the compression section but was in the feature section.  I added
the #DEFINE statement for JPEG support (and even turned on a setting in
ImageMagick's  "\tiff\configure" file) and recompiled ImageMagick but it
still doesn't work - same error message.

Is there some "trick" to getting this to correcly compile?  I suspect it
might need OJPEG support, but when I turn that on (#DEFINE) in "tifconf.h"
I get a compile error.   One of my fallback plans would be to identify the
file using ImageMagick and if it's a TIFF then use tiffcp or tiff2bw to do
the work, but on trying them I get a "Old Style JPEG compression support
not enabled message" in the latest binaries (3.73)

FYI - The old Wang/Kodak "Imaging for Windows" control can read this file
without issue,

Any help would be appreciated.

Dave