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NAME
efix - convert between fax, text, bit-map and gray-scale formats
SYNOPSIS
efix [ options ] [ file... ]
OPTIONS
Where options are:
-i f the input image is in format f. Default is to automatically
determine the input type from its contents.
fax fax ("Group3") 1-D coded image
text text. Line feeds separate lines, form feeds cause page breaks
and tabs are expanded assuming tabs every 8 columns.
pbm raw PBM (portable bit map)
tiffg3
TIFF format with Group 3 (fax) compression.
tiffraw
TIFF format with no compression.
-o f write the output in format f. Default is tiffg3.
fax fax ("Group3") 1-D coded image
pbm raw PBM
pgm raw PGM (Portable Gray Map). Gray-scale values are produced
by summing pixels in 4x4 pixel blocks. The output file is 1/4
of the size given by -p. The resulting image has 17 discrete
values between 0 and 255.
pcl HP-PCL (e.g. HP LaserJet).
ps encapsulated Postscript (e.g. Apple Laserwriter). The file is
compressed using differential coding vertically and run-length
coding horizontally. There is no provision for positioning
the image within the page and so the image will appear at the
lower left corner of the page when printed.
tiffg3
TIFF format with Group 3 (fax) compression.
tiffraw
TIFF format with no compression.
-n pat use the printf(3) pattern path to generate the output file
name. Up to three %d escapes will be replaced by the page
number starting with 1 (e.g. -n order.%03d will create file
names order.001, order.002, etc.)
-v lvl print messages of type in string lvl. Each lower-case letter
in lvl enables one type of message:
e - errors
w - warnings
i - information messages
a - program arguments
f - file format details
The default is "ewi".
-f fnt use font file fnt for text. The font file for an WxH font
should be a PBM file with an image of H lines and 256*W
columns. Each successive WxH cell contains the bit map for
characters with codes from 0 to 255. The default is to use a
built-in 8x16 font.
-s XxY scale the input by a factor of X horizontally and Y
vertically. Scaling does not change the size of the output.
If Y is not specified it is assumed to be the same as X. Any
floating point value may be used for X and Y. The default is
1,1.
-d R,D displace the output right by R and down by D (opposite if
negative). See below for units. Default is 0,0.
-p WxH truncate or pad the output to generate an image of width W and
height H. See below for units. The default is the size of
the input image if it can be determined or A4 (215x297mm) if
it can't.
-r XxY assume an output device resolution of X by Y dots per inch.
If Y is not specified it is assumed to be the same as X. The
default is the input resolution if it can be determined or the
fax resolution of 204.1x195.6 dpi if it can't.
-l n place n lines per page during text input. Default is 66.
-O f overlay (logical OR) the image from file f into the output.
Use
FILES
If no file names are given, input is read from standard input. If no
-n options are given, output is written to the standard output.
UNITS
The units of the W, H, R, and D values above are in inches by default.
Any floating point value may be used. Units of inches, centimetres,
millimetres or points (72 per inch) can be used instead by appending
one of the strings `in', `cm', `mm', or `pt' to the argument (e.g.
-d2,4cm).
CUT AND PASTE
The -d and -p options allow efix to cut out images from received faxes
for use in other faxes or documents. The -d option specifies the top
left portion of the desired image and the -p option gives the size of
the cut image. For example, the command
efix -d-5,-8 -p2,1 sample.001 >sig.001
would cut out part of the input with its top left corner 5 inches from
the left edge and 8 inches from top of the input image. The output
image would be 2 inches wide and 1 inch high.
The -O option allows efix to superimpose two or more images. The
overlay image must be in fax format and cannot be scaled, truncated or
shifted. However, multiple efix commands may be pipelined to transform
images before combining them. For example, the command
efix -d4,8 signature | \
efix -O- letterhead | \
efix -O- letter.002 >letter.002.new
will shift the image in the file signature down 8 inches and right 4
inches and combine (overlay) it with the images in the files letterhead
and letter.002.
REFERENCES
Gunter Born, "The File Formats Handbook", International Thompson
Computer Press, 1995.
COPYRIGHT
efix is copyright 1994, 1995 Ed Casas. It may be used, copied and
modified under the terms of the GNU Public License.
DISCLAIMER
Although efix has been tested it may have errors that will prevent it
from working correctly on your system. Some of these errors may cause
serious problems including loss of data.
SEE ALSO
efax(1), pbm(5), pgm(5), g3topbm(1), pbmtog3(1), ghostscript(1),
BUGS
Only reads two types of TIFF compression formats.
Does not write multi-page TIFF files (a feature).