[hylafax-users] Ghostscript Anti-Aliasing For Better Quality Faxes

["A. Kalten" <akalten@xxxxxxxxxxx>]

Recently, I came across a ghostscript parameter that I didn't
know had even existed.  The parameter is -dTextAlphaBits and
can be used to antialias fonts when producing a TIFF fax file
with the ghostscript tiffg3 drivers.  Specifically, when this
parameter is set to maximum, -dTextAlphaBits=4, the fax file created
is significantly better in quality when using text material created
with OpenOffice or LaTeX or enscript.

After looking at the HylaFAX PostScript conversion script, ps2fax,
I notice that this parameter is not utilized.  Presumably, the
wide variety of PostScript source material that may be presented to
ps2fax precludes any general kind of antialiasing.  But for those
HylaFAX users that produce their own fax files, or for those who
are certain of their source material, I would suggest modifying
the ps2fax script to include this -dTextAlphaBits parameter.

For graphical (non-text) source files, there is an associated
-dGraphicsAlphaBits.

Further information on these parameters is found in the Use.htm
file that comes with the ghostscript source package.  It would be
worth checking out.

Andrew Kalten


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