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NAME
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composite - composite images together.
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Contents
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Synopsis
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composite [ options ... ] change-image base-image
[ mask-image ] output-image
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Description
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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.
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Examples
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To composite an image of a cockatoo with a perch, use:
gm composite cockatoo.miff perch.ras composite.miff
To compute the difference between images in a series, use:
gm composite -compose difference series.2 series.1 difference.miff
To composite an image of a cockatoo with a perch starting at location (100,150),
use:
gm composite -geometry +100+150 cockatoo.miff perch.ras composite.miff
To tile a logo across your image of a cockatoo, use
gm convert +shade 30x60 cockatoo.miff mask.miff
gm composite -compose bumpmap -tile logo.png
cockatoo.miff mask.miff composite.miff
To composite a red, green, and blue color plane into a single composite image,
try
gm composite -compose CopyGreen green.png red.png red-green.png
gm composite -compose CopyBlue blue.png red-green.png composite.png
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Options
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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.
GraphicsMagick(1).
| decrypt image with this password |
| blue chromaticity primary point |
| (This option has been replaced by the -limit option) |
| preferred number of colors in the image |
| annotate an image with a comment |
| the type of image composition |
| the type of image compression |
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-debug <events>
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| add coder/decoder specific options |
| horizontal and vertical resolution in pixels of the image |
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-displace <horizontal scale>x<vertical scale>
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| shift image pixels as defined by a displacement map |
| specifies the X server to contact |
| dissolve an image into another by the given percent |
| apply Floyd/Steinberg error diffusion to the image |
| specify the text encoding |
| specify endianness (MSB or LSB) of output image |
| use this type of filter when resizing an image |
| use this font when annotating the image with text |
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-geometry <width>x<height>{+-}<x>{+-}<y>{%}{@} {!}{<}{>}
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| preferred size and location of the Image window. |
| direction primitive gravitates to when annotating the image. |
| green chromaticity primary point |
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-help
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| the type of interlacing scheme |
| assign a label to an image |
| Disk, File, Map, or Memory resource limit |
| Specify format for debug log |
| store matte channel if the image has one |
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-monochrome
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| transform the image to black and white |
| replace every pixel with its complementary color |
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-page <width>x<height>{+-}<x>{+-}<y>{%}{!}{<}{>}
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| size and location of an image canvas |
| add ICM, IPTC, or generic profile to image |
| JPEG/MIFF/PNG compression level |
| red chromaticity primary point |
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-resize <width>x<height>{%}{@}{!}{<}{>}
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| apply Paeth image rotation to the image |
| sampling factors used by JPEG or MPEG-2 encoder and YUV decoder/encoder. |
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-size <width>x<height>{+offset}
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| width and height of the image |
| hide watermark within an image |
| composite two images to create a stereo anaglyph |
| tree depth for the color reduction algorithm |
| the units of image resolution |
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-unsharp <radius>{x<sigma>}{+<amount>}{+<threshold>}
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| sharpen the image with an unsharp mask operator |
| print detailed information about the image |
| print GraphicsMagick version string |
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-watermark <brightness>x<saturation>
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| percent brightness and saturation of a watermark |
| write an image sequence [convert, composite] |
For a more detailed description of each option, see
Options, above.
GraphicsMagick(1).
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Environment
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COLUMNS
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| 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 GraphicsMagick to see it. |
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DISPLAY
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| X11 display ID (host, display number, and screen in the form
hostname:display.screen). |
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HOME
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| Location of user's home directory. GraphicsMagick 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. |
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MAGICK_CODER_MODULE_PATH
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| Search path to use when searching for image format coder modules.
This path allows the user to arbitrarily extend the image formats
supported by GraphicsMagick by adding loadable modules to an arbitrary
location rather than copying them into the GraphicsMagick 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. |
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MAGICK_CONFIGURE_PATH
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| 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. |
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MAGICK_DEBUG
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| Debug options (see -debug for details) |
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MAGICK_FILTER_MODULE_PATH
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| Search path to use when searching for filter process modules
(invoked via -process). This path allows the user to arbitrarily
extend GraphicsMagick's image processing functionality by adding loadable
modules to an arbitrary location rather than copying them into the
GraphicsMagick 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. |
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MAGICK_HOME
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| Path to top of GraphicsMagick installation directory. Only observed
by "uninstalled" builds of GraphicsMagick which do not have their location
hard-coded or set by an installer. |
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MAGICK_LIMIT_DISK
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| Maximum amount of disk space allowed for use by the pixel cache. |
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MAGICK_LIMIT_FILES
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| Maximum number of open files. |
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MAGICK_LIMIT_MAP
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| Maximum size of a memory map. |
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MAGICK_LIMIT_MEMORY
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| Maximum amount of memory to allocate from the heap. |
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MAGICK_TMPDIR
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| Path to directory where GraphicsMagick should write temporary
files. The default is to use the system default, or the location set by
TMPDIR. |
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TMPDIR
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| 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. |
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TMP or TEMP
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| For Microsoft Windows, the path to the directory where applications
should write temporary files. Overridden by MAGICK_TMPDIR if it
is set. |
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Configuration Files
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Authors
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John Cristy,
Bob Friesenhahn,
Glenn Randers-Pehrson,
William Radcliff,
Leonard Rosenthol.
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Copyright
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Copyright (C) 2002, 2003 GraphicsMagick Group, an organization
dedicated to making software imaging solutions freely available.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files
("GraphicsMagick"), to deal in GraphicsMagick without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of GraphicsMagick,
and to permit persons to whom GraphicsMagick is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of GraphicsMagick.
The software is provided "as is", without warranty of any kind,
express or implied, including but not limited to the warranties of
merchantability, fitness for a particular purpose and noninfringement.
In no event shall GraphicsMagick Group be liable for any claim, damages
or other liability, whether in an action of contract, tort or otherwise,
arising from, out of or in connection with GraphicsMagick or the use or
other dealings in GraphicsMagick.
Except as contained in this notice, the name of the GraphicsMagick
Group shall not be used in advertising or otherwise to promote the sale,
use or other dealings in GraphicsMagick without prior written
authorization from the GraphicsMagick Group.
Additional copyrights and licenses apply to this software. You should
have received a copy of Copyright.txt with this package, which describes
additional copyrights and licenses which apply to this software;
otherwise see http://www.graphicsmagick.org/www/Copyright.html.
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