On Thu, 6 Sep 2012, newtotesseract wrote:
Hi Nick,
I tried passing in the CCITTFaxDecode data to tesseract,
but it was not detected as TIFF.
It seems like CCITT fax is not same as TIFF.
Google search showed me that few other people also faced
same issue (e.g."http://stackoverflow.com/questions/2641770/extracting-im
age-from-pdf-with-ccittfaxdecode-filter").
If you know, how we can convert the CCITT-Fax to tiff or
jpeg, it would be really helpful.
Many thanks for your help and time.
Thanks,
- ganesh
TIFF files can contain many kinds of image data compressed
with all sorts of types of compression. CCITT _is_ one
of the supported compression types. If you can install
ImageMagick, then you can use the 'convert' program in that
package to create your TIFF file. For example:
convert in.fax -compress Group4 out.tif
converts the file to TIFF using CCITT Group4 compression
in the output.
Or, if you have libtiff installed, then you can use
the fax2tiff program to do the conversion.
Don't convert to jpeg; it isn't meant for bi-level images.
Cheers,
Rob Komar
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