SGI2FAX(1)SGI2FAX(1)NAMEsgi2fax - convert a Silicon Graphics image file for fac
simile transmission
SYNOPSIS
${LIBEXEC}/sgi2fax [ options ] files...
DESCRIPTIONsgi2fax converts Silicon Graphics format images to bilevel
TIFF Class F images in preparation for transmission as
facsimile. sgi2fax is not normally invoked directly; it
is usually run by sendfax(1) when an SGI image file is
submitted for transmission.
Images are converted by scaling them to fill the guaran
teed reproducible area on a default page. Each RGB pixel
p is converted to greyscale according to:
pr * %r + pg * %g + pb * %b
where %r, %g, and %b default to 30, 59, and 11, respec
tively. Greyscale images are then process with a high
pass filter and dithered to a bilevel image. The resul
tant image are written as a TIFF Class F document.
By default, the output image is created with 204 dots/inch
horizontal resolution and 98 lines/inch vertical resolu
tion. The image is written as Group 3 1D-encoded data.
OPTIONS-1 (-2) Write the image as Group 3 1D- (2D-) encoded
data.
-b %b Set the %b parameter used to convert color pixel
values to greyscale pixel values.
-g %g Set the %g parameter used to convert color pixel
values to greyscale pixel values.
-l Generate an image at 98 lines/inch vertical resolu
tion. know as low resolution.
-m Generate an image at 196 lines/inch vertical reso
lution.
-o file
Write output to file instead of the default file
named sgi.fax.
-r %r Set the %r parameter used to convert color pixel
values to greyscale pixel values.
-s size
Set the output size according to the named page
size. Images are normally created with a system-
default page size (usually letter-size pages, 8.5"
by 11", for sites in North America). Alternate
page sizes are specified symbolically using either
the name or abbreviation of an entry in the page_
sizes(${MANNUM4_5}) database; e.g. a3 (ISO A3), a4
(ISO A4), a5 (ISO A5), a6 (ISO A6), b4 (ISO B4),
na-let (North American Letter), us-leg (American
Legal), us-led (American Ledger), us-exe (American
Executive), jp-let (Japanese Letter), and jp-leg
(Japanese Legal). Comparisons are case-insensitive
and any match of a substring of the full page-size
name is sufficient; e.g. ``legal'' would match
``American Legal''.
FILES
${LIBDATA}/pagesizes page size database
SEE ALSOhylafax-client(1), sendfax(1), hylafax-server(${MAN_
NUM4_5})
June 14, 1994 SGI2FAX(1)
