Converting TIFF files to PDF and/or JPEG

[sophie_newbie]

Hey guys,

As part of a college project I'm trying to write a script to convert
TIFF images downloaded from the US patent office site, www.uspto.gov.

The tiff images are encoded using CCITT Group 4 compression and appear
to throw an error when i try to save them using the Image library:


It looks like this odd compression format is not supported, or am i
wrong?

I know its a long shot but would anyone have a different solution?

Sophie.

 

[Fredrik Lundh]

As part of a college project I'm trying to write a script to convert
TIFF images downloaded from the US patent office site, www.uspto.gov.

The tiff images are encoded using CCITT Group 4 compression and appear
to throw an error when i try to save them using the Image library:


It looks like this odd compression format is not supported, or am i
wrong?

I know its a long shot but would anyone have a different solution?

http://mail.python.org/pipermail/python-list/2005-January/258893.html

</F>

 

[Paul Rubin]

It looks like this odd compression format is not supported, or am i
wrong?

I know its a long shot but would anyone have a different solution?

I don't know about doing it directly in Python but there's a Linux
command line utility called tiff2ps (and now tiff2pdf) that I've done
that with.

At one point I was doing a lot of these conversions and I remember
writing a Python script around the command line utility to take care
of finding the files to convert, generating the right filenames, and
so forth. It was no big deal.

 

[billuseslinux]

The Tiff library and utilities combined with Ghostscript make this very
easy.

http://www.remotesensing.org/libtiff/

http://www.cs.wisc.edu/~ghost/

With the above two packages installed, you can do something like this
in Python:

def tiff2pdf(width, length, files):
path, filename = os.path.split(files)
name, ext = os.path.splitext(filename)
output = os.path.join(path, name + ".pdf")
command = \
'tiff2ps -a2 -w%s -h%s "%s" | ps2pdf - "%s"' % (width, length,
files, output)
os.popen(command)

I use a function like this all the time to convert Tiffs to PDF.

HTH

Bill

 

[sophie_newbie]

Hmm, does anyone know if there is a way to uncompress Tiff files in
python itself without having to make an os call.

This is because the script is kind of supposed to run on windows
also...

Sophie.