Re: Question about HylaFAX - pdf to fax conversion

I feel doomed :(

I tried doing what the HylaFAX+ does (by the sourcecode you sent, and also
checked the source code myself to figure the correct parameter values), and
the output sucks :(

Any other suggestions?

Thanks,
Ido

On Sun, Jan 3, 2016 at 7:58 PM, Lee Howard <[email protected]> wrote:

> My recommendation would be to upgrade the installation to HylaFAX+.  But,
> from the source code hylafax-5.5.7/util/common-functions.sh.in:
>
>     if [ "$DITHERING" = "gs-stocht" ]; then
>         $CAT $files | $PS -q \
>             -sDEVICE=$device \
>             -dNOPAUSE \
>             -dSAFER=true \
>             -sPAPERSIZE=$paper \
>             -dBATCH \
>             -r$hres\x$vres \
>             "-sOutputFile=$out" \
>             $STRIPSIZE \
>             $FIXEDWIDTH \
>             $AUTOROTATE \
>             stocht.ps -c "<< /HalftoneMode 1 >> setuserparams" -
>         return
>     fi
>
> Thanks,
>
> Lee.
>
>
> On 01/03/2016 01:31 AM, Ido Diamant wrote:
>
>> Hi,
>>
>> I think I am using HylaFAX, and not the + version (it's part of the
>> Elastix solution).
>> I tried placing the DITHERING in the FaxModify, but no change in the
>> output fax.
>>
>> Any other suggestion?
>> Do you know what's the parameter for ghostscript to use the stochastic
>> mode instead of regular? (I can edit the pdf2fax file and change its
>> parameters to make it better, if I know the right parameters).
>>
>> thanks,
>> Ido
>>
>> On Thu, Dec 31, 2015 at 7:33 PM, Lee Howard <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>>     Many people do not appreciate the default dithering that
>>     Ghostscript does on color images when producing faxable TIFF images.
>>
>>     If you're using HylaFAX+ then you can put:
>>
>>     DITHERING=libtiff-fs
>>
>>     ... or...
>>
>>     DITHERING=gs-stocht
>>
>>     into /var/spool/hylafax/etc/FaxModify, and you'll get a prettier
>>     result.
>>
>>     Thanks,
>>
>>     Lee.
>>
>>
>>
>>     On 12/31/2015 05:49 AM, Ido Diamant wrote:
>>
>>         Hi,
>>
>>         I am having a problem with HylaFax through Elastix.
>>
>>         Faxes are being received correctly, and sent fine. I have a
>>         problem with the quality of the fax sent from PDF.
>>         e.g. if I send a PDF through the sendfax commandline, or
>>         through the Elastix UI, the PDF is being converted to a TIFF
>>         for the fax sending using this command:
>>
>>         /usr/bin/gs -q -sDEVICE=tiffg4 -dNOPAUSE -dSAFER=true
>>         -sPAPERSIZE=a4 -dFIXEDMEDIA -dMaxStripSize=0 -dBATCH
>>         -r209.10x196 -sOutputFile=docq/doc604.pdf;c1 docq/doc604.pdf.604
>>
>>         (this is the command that is being ran by the pdf2fax script).
>>
>>         the output file's quality is very poor, what causes the fax
>>         sent to be in poor quality, and sometimes not readable.
>>
>>         I tried playing with the conversion, and noticed that when
>>         using -sDEVICE=tiffgray the file is better, but not able to
>>         send it through the sendfax, because its not compressed with
>>         Group 3 or Group 4 compression.
>>
>>         What's the best method to convert pdf2fax so it'll make it
>>         black/white but in good quality and sharp, and not bad quality?
>>
>>         Thanks,
>>         Ido
>>
>>
>>
>>
>