pnmcat
Updated: 30 May 2011
Table Of Contents
NAME
pnmcat - concatenate Netpbm images
SYNOPSIS
pnmcat
{-leftright | -lr | -topbottom | -tb}
[-white|-black]
[-jtop|-jbottom|-jcenter]
[-jleft|-jright|-jcenter]
pnmfile ...
Minimum unique abbreviation of option is acceptable. You may use
double hyphens instead of single hyphen to denote options. You may
use white space in place of the equals sign to separate an option name
from its value.
DESCRIPTION
This program is part of Netpbm.
pnmcat reads one or more PNM images as input, concatenates them
either left to right or top to bottom, and produces a single PNM image
as output.
The arguments are names of input files. Any one of these, but not more
than one, may be "-" to indicate Standard Input. If you have no
arguments, that means a single input image from Standard Input (and that is
pointless - the output is the same as the input).
To assemble a regular grid of images, you can use pamundice.
To do the reverse, you might use pamdice to split an image
up into smaller ones of equal size or pamcut to chop off part
of an image or extract part of an image.
pnmtile concatenates a single input image to itself repeatedly.
OPTIONS
In addition to the options common to all programs based on libnetpbm
(most notably -quiet, see
Common Options), pnmcat recognizes the following
command line options:
Direction
- -topbottom, -tb
- Combine images vertically, top to bottom.
- -leftright, -lr
- Combine images horizontally, left to right.
You must specify the direction by specifying one of the above.
Justification
- -jleft, -jcenter, -jright
-
If the PNM images are not all the same height (left-right) or width
(top-bottom), the smaller ones have to be justified with the largest.
By default, pnmcat centers them, but you can specify
justification to one side or the other with one of the
-jxxx options. So, -topbottom -jleft would stack the
PNMs on top of each other, flush with the left edge. -leftright
-jbottom would line up the images left to right with their bottom edges
aligned as if sitting on a table.
Margin Color
- -white, -black
- These options specify what color to use to fill in the extra space
when doing the justification. If neither is specified, pnmcat
chooses whichever seems to be right for the images.
SEE ALSO
pamundice,
pamdice,
pnmtile,
pamcut,
pnm
AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
Table Of Contents