[python-win32] JPEG to TIFF conversion

[Larry Bates]

Larry Bates wrote:
> Manjeet Singh wrote:
>> Hi,
>>    I am a new to the image conversion /compression concepts. I have few 
>> thousands of images which were scanned in Uncompressed JPEG format(.Tiff 
>> and .Jpeg). I am required to convert them to standard tiff files(CCIT 
>> Group4). Is there any way to accomplish this in Python? I will be 
>> thankful for the comments and suggestions. I am using Python 2.3.
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> python-win32 mailing list
>> python-win32 at python.org
>> http://mail.python.org/mailman/listinfo/python-win32
> 
> PIL can convert to TIF, but can't save as compressed TIF.  You can use an 
> external program like tiffcp to compress them.  I've done this before by writing 
> the file, then calling os.system to run tiffcp.
> 
> -Larry

Manjeet Singh Wadhwa wrote:
 > Hi Larry,
 >             Thanks a lot for your information. I really appreciate it. Do you 
know any site where I can get the code from to convert my file into Tiff using PIL .
 >
 >
 > From: *Larry Bates* <larry.bates at websafe.com <mailto:larry.bates at websafe.com>>
 > Date: Dec 11, 2007 9:47 AM
 > Subject: Re: [python-win32] JPEG to TIFF conversion
 > To: python-win32 at python.org <mailto:python-win32 at python.org>
 >
 >
 > Manjeet Singh wrote:
 >  > Hi,
 >  >    I am a new to the image conversion /compression concepts. I have few
 >  > thousands of images which were scanned in Uncompressed JPEG format(.Tiff
 >  > and .Jpeg). I am required to convert them to standard tiff files(CCIT
 >  > Group4). Is there any way to accomplish this in Python? I will be
 >  > thankful for the comments and suggestions. I am using Python 2.3.
 >  >
 >  >
 >  > ------------------------------------------------------------------------
 >  >
 >  > _______________________________________________
 >  > python-win32 mailing list
 >  > python-win32 at python.org <mailto:python-win32 at python.org>
 >  > http://mail.python.org/mailman/listinfo/python-win32 
<http://mail.python.org/mailman/listinfo/python-win32>
 >
 > PIL can convert to TIF, but can't save as compressed TIF.  You can use an
 > external program like tiffcp to compress them.  I've done this before by writing
 > the file, then calling os.system to run tiffcp.
 >
 > -Larry
 >
 > _______________________________________________
 > python-win32 mailing list
 > python-win32 at python.org <mailto:python-win32 at python.org>
 > http://mail.python.org/mailman/listinfo/python-win32
 >
 >
 >
 >
 >
 >   Warm Regards,
 >
 > *Manjeet Singh Wadhwa *
 >
 >
 >     FileNet BPM and Document Imaging Solutions
 >
 > *Extension 20716*
 > *
 > ------------------------------------------------------------------------
 > *
 >
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Are all your images single pages and do you want to create single page TIF
files?  If so it is quite easy:

from PIL import Image
#
# Assumptions: your .jpg files are 256 bit color (or grayscale)
#
im=Image.open(inputFile)
im2=im.convert('1') # convert to black and white
im2.save(outputFile, 'TIFF')

where:

inputFile is your .JPG file
outputFile is your .TIF file

then use:

tiffcp -c g4 outputfile.tif outputfileG5.tif


On the other hand, if you want to create multi-page tiffs it is quite a bit more 
complicated.  This creates uncompressed TIF file.  I've used NetPBM

Hope this helps.

-Larry