seeking guidance on image conversion

Hello,

I am new to this list, having gotten involved in a project
at work 
that uses PIL. I am looking for guidance in a few areas,
hoping to 
find a better way than our methods for manipulating images.

We have a workflow which involves converting various file
formats to 
TIFF, and allowing them to be viewed and manipulated in a
wxPython 
app.

Currently we are calling on some external binaries to
perform these 
conversions on a Linux server, and in some cases the Windows
desktop 
clients have to do some conversions as well. It would be
nice if 
there were some more Python native approaches available.

The goal is to get everything into a compressed TIFF format.

Currently we do that for Word documents and PDF documents.
We also 
need to convert between multipage TIFF and single page TIFF.
Here is 
a list of the image conversions we are performing:

* One of the Python scripts is calling Linux tiffsplit
command to 
convert multipage faxes (TIFF group 4 compressed) into
collections of 
single page TIFFs.

* The wxPython app is calling GnuWin32's tiffcp.exe to
rejoin single 
page TIFFs into multipage TIFFs.

* We're calling the ImageMagick convert command to make PDFs
into TIFFs.

* We're calling an Open Office 1.1.5 command line tool to
convert 
Word documents to PDF (which then get converted to TIFF by 
ImageMagick).

In some of these cases there may be C libraries we could
wrap, but if 
someone has already done that work or if there is a better
approach I 
would be grateful to hear about it.

Thanks!

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Brad Allen wrote:
> Hello,
> 

Hello,

> I am new to this list, having gotten involved in a
project at work 
> that uses PIL. I am looking for guidance in a few
areas, hoping to 
> find a better way than our methods for manipulating
images.
> 
> We have a workflow which involves converting various
file formats to 
> TIFF, and allowing them to be viewed and manipulated in
a wxPython 
> app.
> 

A solution can be that already replied.
Another can be to use freeimagepy that is born because PIL
doesn't
handle, like I need, the g3, g4 and multipage tiff files.
I create it, and I use it, for hylapex, a fax client that
need to work
with fax files, that are in g3 and g4 format!
My old solution, like you wrote, was use the tiff gnuwin32
files, but
work with a dll a some python (ctypes) code, are better!


> Here is a list of the image conversions we are
performing:
> 
> * One of the Python scripts is calling Linux tiffsplit
command to 
> convert multipage faxes (TIFF group 4 compressed) into
collections of
>  single page TIFFs.

Ok with freeimagepy (convertToMultiPage and
convertToSinglePages)

> 
> * The wxPython app is calling GnuWin32's tiffcp.exe to
rejoin single 
> page TIFFs into multipage TIFFs.
> 

Like above

> * We're calling the ImageMagick convert command to make
PDFs into 
> TIFFs.
> 

I use ghostscript (present on linux, but not on win, where I
need it and
install it every time) for do all the work.
It's not so difficult to do the work. If you need some
questions, I'm here.

> * We're calling an Open Office 1.1.5 command line tool
to convert 
> Word documents to PDF (which then get converted to TIFF
by 
> ImageMagick).
> 

Like said, you can use pdfcreator or ghostscript itself,
that has the
psXXX and pdfXXX devices.

> In some of these cases there may be C libraries we
could wrap, but if
>  someone has already done that work or if there is a
better approach 
> I would be grateful to hear about it.
> 

My image library wrapper are there! If you want to
contribute for add
the part that I don't already wrap, contact me!

> Thanks!
> 

Bye,
Michele

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