fax2ps
convert a TIFF facsimile to compressed PostScript™
see also :
tiff2ps
Synopsis
fax2ps [
options ] [ file ... ]
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examples
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description
fax2ps
reads one or more TIFF facsimile image files
and prints a compressed form of PostScript on the standard
output that is suitable for printing.
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 options.
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 document.
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 PostScript 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 operator. 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).
options
-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 file.
-y
resolution
Use resolution as the
vertical resolution, in lines/inch, of the image data. By
default this value is taken from the file.
-S
Scale each page of image data to fill the output page
dimensions. 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.
-H height
Use height as the height, in inches, of the
output page.
diagnostics
Some messages about malformed TIFF images come
from the TIFF library.
Various messages about badly formatted facsimile images may be
generated 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.
notes
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.
bugs
fax2ps
should probably figure out when it is doing a poor job of
compressing the output and just generate PostScript to image
the bitmap raster instead.
see also
tiff2ps ,
libtiff
Libtiff library
home page: http://www.remotesensing.org/libtiff/