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

[Dmitry Bely <dbely@mail.ru>]

Giulio Orsero <giulioo@pobox.com> writes:

> >> man sendfax talks about -m and -l for low (98) and medium (196)
> >> resolution.
> >> So, is there an high resolution?
> >
> >It does not exist. Only two resolutions (98x196 and 196x196) are supported
> >by Hylafax. T.30 defines the following possible options:
> 
> >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.
> >
> >R8 x 7.7 lines/mm   (normal)    -- mandatory
> >R8 x 15.4 lines/mm  (fine)      -- mandatory
> >R16 x 15.4 lines/mm (superfine) -- optional
> >200 x 200 pels/inch             -- optional
> >300 x 300 pels/inch             -- optional
> >400 x 400 pels/inch             -- optional
> 
> 
> In the above examples, "fine" is ISO A4 @ 15.4 lines/mm,

Ahhh, sorry again :-(( The table below seems to be correct at last:

R8 x 3.85 lines/mm  (normal)    -- mandatory
R8 x 7.7 lines/mm   (fine)      -- mandatory
R8 x 15.4 lines/mm  (superfine) -- optional 
R16 x 15.4 lines/mm             -- optional
200 x 100 pels/inch             -- optional
200 x 200 pels/inch             -- optional
300 x 300 pels/inch             -- optional
400 x 400 pels/inch             -- optional

where

R8 = 1728 pels/(215 mm +/- 1%) for ISO A4
R8 = 2048 pels/(255 mm +/- 1%) for ISO B4
R8 = 2432 pels/(303 mm +/- 1%) for ISO A3
R16 = 3456 pels/(215 mm +/- 1%) for ISO A4
R16 = 4096 pels/(255 mm +/- 1%) for ISO B4
R16 = 4864 pels/(303 mm +/- 1%) for ISO A3

Hope to hear from you soon,
Dmitry




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