SGI2FAX(1)SGI2FAX(1)NAMEsgi2fax - convert a Silicon Graphics image file for facsimile transmis‐
sion
SYNOPSIS
/usr/sbin/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 guaranteed repro‐
ducible 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, respectively.
Greyscale images are then process with a high pass filter and dithered
to a bilevel image. The resultant 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 resolution. 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 resolution. know as
low resolution.
-m Generate an image at 196 lines/inch vertical resolution.
-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 pagesizes(5F) 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). Compar‐
isons 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
/usr/share/fax/pagesizes page size database
SEE ALSOhylafax-client(1), sendfax(1), hylafax-server(5F)
June 14, 1994 SGI2FAX(1)
