fax2ps man page on DigitalUNIX

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FAX2PS(1)							     FAX2PS(1)

       fax2ps - convert a TIFF facsimile to compressed POSTSCRIPT™

       fax2ps [ options ] [ file...  ]

       fax2ps  reads  one or more TIFF facsimile image files and prints a com‐
       pressed form of POSTSCRIPT on the standard output that is suitable  for

       By  default,  each  page	 is scaled to reflect the image dimensions and
       resolutions stored in the file.	The -x and -y options can be  used  to
       specify	the  horizontal	 and  vertical image resolutions (lines/inch),
       respectively.  If the -S option is specified, each page	is  scaled  to
       fill  an	 output	 page.	 The  default output page is 8.5 by 11 inches.
       Alternate page dimensions can be specified in inches with the -W and -H

       By  default fax2ps generates POSTSCRIPT for all pages in the file.  The
       -p option can be used to select one or more  pages  from	 a  multi-page

       fax2ps  generates a compressed form of POSTSCRIPT that is optimized for
       sending pages of text to	 a  POSTSCRIPT	printer	 attached  to  a  host
       through	a low-speed link (such as a serial line).  Each output page is
       filled with white and then only the black areas are drawn.   The	 POST‐
       SCRIPT  specification  of  the black drawing operations is optimized by
       using a special font that encodes the move-draw operations required  to
       fill  the black regions on the page.  This compression scheme typically
       results in a substantially reduced POSTSCRIPT description, relative  to
       the  straightforward imaging of the page with a POSTSCRIPT image opera‐
       tor.  This algorithm can, however, be ineffective  for  continuous-tone
       and  white-on-black  images.   For  these  images, it sometimes is more
       efficient to send the raster bitmap image directly; see tiff2ps(1).

       -p number Print only the indicated page.	 Multiple pages may be printed
		 by specifying this option more than once.

       -x resolution
		 Use resolution as the horizontal resolution, in dots/inch, of
		 the image data.  By default this  value  is  taken  from  the

       -y resolution
		 Use  resolution as the vertical resolution, in lines/inch, of
		 the image data.  By default this  value  is  taken  from  the

       -S	 Scale	each page of image data to fill the output page dimen‐
		 sions.	 By default images  are	 presented  according  to  the
		 dimension information recorded in the TIFF file.

       -W width	 Use  width  as the width, in inches, of the output page.  The
		 default page width is 8.5 inches.

       -H height Use height as the height, in inches, of the output page.  The
		 default page height is 11 inches.

       Some messages about malformed TIFF images come from the TIFF library.

       Various	messages  about badly formatted facsimile images may be gener‐
       ated due to transmission errors in received facsimile.  fax2ps attempts
       to recover from such data errors by resynchronizing decoding at the end
       of the current scanline.	 This can  result  in  long  horizontal	 black
       lines in the resultant POSTSCRIPT image.

       If  the	destination  printer  supports	POSTSCRIPT Level II then it is
       always faster  to  just	send  the  encoded  bitmap  generated  by  the
       tiff2ps(1) program.

       fax2ps  should  probably figure out when it is doing a poor job of com‐
       pressing the output and just generate POSTSCRIPT to  image  the	bitmap
       raster instead.

       tiff2ps(1), libtiff(3)

				March 16, 1995			     FAX2PS(1)

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