Re: [hylafax-users] Vertical resolution: HighRes ?

[Dmitry Bely <dbely@mail.ru>]

"Jay R. Ashworth" <jra@baylink.com> writes:

> On Mon, Oct 09, 2000 at 07:02:40PM +0300, Dmitry Bely wrote:
> > > It does not exist. Only two resolutions (98x196 and 196x196) are supported
> > > by Hylafax.
> > 
> > Ah, sorry. Of course 204 x 98 and 204 x 196 (i.e. R8 x 7.7 lines/mm and R16 
> > x 15.4 lines/mm). Everything else seems to be right.
> 
> I've actually customarily seen those quoted as 203x98 and 203x196, and
> yes,

That's possibly due to different rounding. Fax resolution is defined in
metric system, and R8 = 1728 pels/215 mm = 8.037 pels/mm = 204.145
pels/inch

> I've seen a "superfine" mode on several machines that does
> 203x392;

Yes, but 204x391 :-) See my previous message here.

> I assumed it was non-standard, but it's probably not that hard
> to grok... at least in Class 1.  (See?  A convert.  :-)

:-)

That's not so easy. For Class 2/2.0 it is not possible at all -- modem
itself should support it. As for Class1 --  yes, it's possible but

- ghostscript does not support anything but normal & fine resolution --
you'll have to rewrite its tiffg3/tiffg32d driver
- tiffcheck has to be updated
- bin/ps2fax has to be updated
- numerous changes in Hylafax itself have to be made.

Hope to hear from you soon,
Dmitry




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