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July 2009

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2009.07.07 00:38 "tiffcrop using incorrect units", by Kevin Myers

I am attempting to use the tiffcrop utility to crop some extremely large
images (multi-hundred megapixel) so that I can process the resulting smaller
images in an OCR application.  Unfortunately, tiffcrop seems to be ignoring
or misinterpreting the pixel units that I have specified using the -U
option.  Here is the command that I used:

tiffcrop -i -E top -U px -X 2400 -Y 4800 oldfile.tif newfile.tif

I am using libtiff version 3.8.2 under Windows XP.  Based on results with
different -X and -Y values, it appears that tiffcrop is interpreting the
values as inches rather than pixels.

Am I doing something wrong?

Thanks,
Kevin M.