composite composites (combines) images to
create new images.
base-image is the base image and change-image
contains the changes. ouput-image is the result, and
normally has the same dimensions as base-image.
The optional mask-image can be used to provide opacity
information for change-image when it has none or if you
want a different mask. A mask image is typically grayscale and the
same size as base-image. If mask-image is
not grayscale, it is converted to grayscale and the resulting
intensities are used as opacity information.
Examples
To composite an image of a cockatoo with a perch, use:
composite cockatoo.miff perch.ras composite.miff
To compute the difference between images in a series, use:
Options are processed in command line order. Any option you
specify on the command line remains in effect only for the image
that follows. All options are reset to their default values after
each image is read.
For a more detailed description of each option, see Options,
above.
ImageMagick(1).
Output screen width. Used when formatting text for the screen.
Many Unix systems keep this shell variable up to date, but it may
need to be explicitly exported in order for ImageMagick to see
it.
DISPLAY
X11 display ID (host, display number, and screen in the form
hostname:display.screen).
HOME
Location of user's home directory. ImageMagick searches for
configuration files in $HOME/.magick if the directory exists. See
MAGICK_CODER_MODULE_PATH,
MAGICK_CONFIGURE_PATH, and
MAGICK_FILTER_MODULE_PATH if more flexibility is
needed.
MAGICK_CODER_MODULE_PATH
Search path to use when searching for image format coder
modules. This path allows the user to arbitrarily extend the image
formats supported by ImageMagick by adding loadable modules to an
arbitrary location rather than copying them into the ImageMagick
installation directory. The formatting of the search path is
similar to operating system search paths (i.e. colon delimited for
Unix, and semi-colon delimited for Microsoft Windows). This user
specified search path is used before trying the default search
path.
MAGICK_CONFIGURE_PATH
Search path to use when searching for configuration (.mgk)
files. The formatting of the search path is similar to operating
system search paths (i.e. colon delimited for Unix, and semi-colon
delimited for Microsoft Windows). This user specified search path
is used before trying the default search path.
MAGICK_DEBUG
Debug options (see -debug for
details)
MAGICK_FILTER_MODULE_PATH
Search path to use when searching for filter process modules
(invoked via -process). This path allows the user
to arbitrarily extend ImageMagick's image processing functionality
by adding loadable modules to an arbitrary location rather than
copying them into the ImageMagick installation directory. The
formatting of the search path is similar to operating system search
paths (i.e. colon delimited for Unix, and semi-colon delimited for
Microsoft Windows). This user specified search path is used before
trying the default search path.
MAGICK_FONT_PATH
Directory where ImageMagick should look for TrueType and
Postscript Type1 font files if the font file is not found in the
current directory. It is preferred to define the available fonts
via type.mgk rather than use
MAGICK_FONT_PATH.
MAGICK_HOME
Path to top of ImageMagick installation directory. Only
observed by "uninstalled" builds of ImageMagick which do not have
their location hard-coded or set by an installer.
MAGICK_DISK_LIMIT
Maximum amount of disk space allowed for use by the pixel
cache.
MAGICK_FILES_LIMIT
Maximum number of open files.
MAGICK_MAP_LIMIT
Maximum size of a memory map.
MAGICK_MEMORY_LIMIT
Maximum amount of memory to allocate from the
heap.
MAGICK_TMPDIR
Path to directory where ImageMagick should write temporary
files. The default is to use the system default, or the location
set by TMPDIR.
TMPDIR
For POSIX-compatible systems (Unix-compatible), the path to the
directory where all applications should write temporary files.
Overridden by MAGICK_TMPDIR if it is
set.
TMP or
TEMP
For Microsoft Windows, the path to the directory where
applications should write temporary files. Overridden by
MAGICK_TMPDIR if it is
set.
Copyright (C) 1999-2004 ImageMagick Studio LLC.
Additional copyrights and licenses apply to this software, see
http://www.imagemagick.org/www/Copyright.html