Re: flexfax: TIF format used by hylafax ... <?>

[Tim Kelley <tpkelley@winkinc.com>]

David Woolley wrote:
> 
> > We use an OCR program to convert incoming faxes to text ... for some
> > reason this program cannot read all of the files which hylafax creates
> > (but it does read some of them).  This seems random.
> >
> > I know the program only reads class 2-4 TIFF files; is this compatible
>                                 ^^^^^^^^^^
> I don't think there is any such thing! (but might copy of the TIFF
> spec is too deeply buried to check quickly).

I realized what the problem is - the OCR program needs the images (be
they TIFF or whatever) to be in at least 200 dpi and many faxes come in
at 150 dpi; of course I can't stop people from sending faxes at 150
dpi.  Of course the error messages did not even hint that that was the
problem. (stupid windows program).


> I would expect any OCR program to cope with fax coded (i.e. classs F)
> TIFF files, but maybe not all of the suboptions.  However, there are
> tools as part of the TIFF package, which is a pre-requesite for Hylafax,
> that will convert between different TIFF subtypes.


However, does anyone know of a (linux) utility to increase dpi of
images?  Perhaps I could have faxrcvd process it with that before
sending?  Thanks for your advice!
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