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SGI2FAX(1)		    General Commands Manual		    SGI2FAX(1)

NAME
       sgi2fax - convert a Silicon Graphics image file for facsimile transmis-
       sion

SYNOPSIS
       /usr/local/sbin/sgi2fax [ options ] files...

DESCRIPTION
       sgi2fax 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  Le-
	      gal), 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 ``Amer-
	      ican Legal''.

FILES
       /usr/local/lib/fax/pagesizes  page size database

SEE ALSO
       hylafax-client(1), sendfax(1), hylafax-server(5F)

				 June 14, 1994			    SGI2FAX(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | SEE ALSO

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