ImageMagick - Composite an Image
Description: ImageMagick is a robust collection of tools and libraries to read, write, and manipulate an image in many image formats including popular formats like TIFF, JPEG, PNG, PDF, PhotoCD, and GIF. With ImageMagick you can create images dynamically, making it suitable for Web applications. You can also resize, rotate, sharpen, color reduce, or add special effects to an image or image sequence and save your completed work in the same or differing image format. Image processing operations are available from the command line, as well as through C, C++, Perl, or Java programming interfaces.
Keywords: ImageMagick,PerlMagick,GraphicsMagick,Magick++,Image,Magick,Magic,Pixel,Graphics,Perl,Wand

NAME
| composite - composite images together.
Contents
| Synopsis Description Examples Options Environment Authors Copyright
Synopsis
| composite [ options ... ] image composite [ mask ] composited
Description
| composite composite images to create new images. composite is the base image and image contains the changes. composited is the result, and normally has the same dimensions as composite. The optional mask can be used to provide matte information for composite when it has none or if you want a different mask. A mask image is typically grayscale and the same size as composite. If mask is not grayscale, it is converted to grayscale and the resulting intensities are used as matte 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:
        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:
        composite -geometry +100+150 cockatoo.miff perch.ras composite.miff
To tile a logo across your image of a cockatoo, use
        convert +shade 30x60 cockatoo.miff mask.miff
        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
        composite -compose CopyGreen green.png red.png red-green.png
        composite -compose CopyBlue blue.png red-green.png composite.png
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Options
| 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 ImageMagick(1).
| -authenticate <string>
| decrypt image with this password
| -background <color>
| the background color
| -blue-primary <x>,<y>
| blue chromaticity primary point
| -cache <threshold>
| (This option has been replaced by the -limit option)
| -colors <value>
| preferred number of colors in the image
| -colorspace <value>
| the type of colorspace
| -comment <string>
| annotate an image with a comment
| -compose <operator>
| the type of image composition
| -compress <type>
| the type of image compression
| -debug <events>
| enable debug printout
| -density <width>x<height>
| vertical and horizontal resolution in pixels of the image
| -depth <value>
| depth of the image
| -displace <horizontal scale>x<vertical scale>
| shift image pixels as defined by a displacement map
| -display <host:display[.screen]>
| specifies the X server to contact
| -dispose <method>
| GIF disposal method
| -dissolve <percent>
| dissolve an image into another by the given percent
| -dither
| apply Floyd/Steinberg error diffusion to the image
| -encoding <type>
| specify the text encoding
| -endian <type>
| specify endianness (MSB or LSB) of output image
| -extract <width>x<height>{+-}<x>{+-}<y>{%}{@} {!}{<}{>}
| extract an area from the image while decoding
| -filter <type>
| use this type of filter when resizing an image
| -font <name>
| use this font when annotating the image with text
| -geometry <width>x<height>{+-}<x>{+-}<y>{%}{@} {!}{<}{>}
| preferred size and location of the Image window.
| -gravity <type>
| direction primitive gravitates to when annotating the image.
| -green-primary <x>,<y>
| green chromaticity primary point
| -help
| print usage instructions
| -interlace <type>
| the type of interlacing scheme
| -label <name>
| assign a label to an image
| -limit <type> <value>
| Disk, File, Map, or Memory resource limit
| -log <string>
| -matte
| store matte channel if the image has one
| -monochrome
| transform the image to black and white
| -negate
| replace every pixel with its complementary color
| -page <width>x<height>{+-}<x>{+-}<y>{%}{!}{<}{>}
| size and location of an image canvas
| -profile <filename>
| add ICM, IPTC, or generic profile to image
| -quality <value>
| JPEG/MIFF/PNG compression level
| -red-primary <x>,<y>
| red chromaticity primary point
| -render
| render vector operations
| -resize <width>x<height>{%}{@}{!}{<}{>}
| resize an image
| -rotate <degrees>{<}{>}
| apply Paeth image rotation to the image
| -sampling-factor <horizontal_factor>x<vertical_factor>
| sampling factors used by JPEG or MPEG-2 encoder and YUV decoder/encoder.
| -scene <value>
| set scene number
| -sharpen <radius>{x<sigma>}
| sharpen the image
| -size <width>x<height>{+offset}
| width and height of the image
| -stegano <offset>
| hide watermark within an image
| -stereo
| composite two images to create a stereo anaglyph
| -treedepth <value>
| tree depth for the color reduction algorithm
| -trim
| trim an image
| -type <type>
| the image type
| -units <type>
| the type of image resolution
| -unsharp <radius>{x<sigma>}{+<amount>}{+<threshold>}
| sharpen the image with an unsharp mask operator
| -verbose
| print detailed information about the image
| -version
| print ImageMagick version string
| -watermark <brightness>x<saturation>
| percent brightness and saturation of a watermark
| -white-point <x>,<y>
| chromaticity white point
| -write <filename>
| write an image sequence [convert, composite]
For a more detailed description of each option, see ImageMagick(1).
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Environment
| DISPLAY
| To get the default host, display number, and screen.
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Authors
| John Cristy, magick-users@imagemagick.org, ImageMagick Studio LLC, Glenn Randers-Pehrson, randeg@alum.rpi.edu, ImageMagick Studio LLC.
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Copyright
| Copyright (C) 2003 ImageMagick Studio Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files ("ImageMagick"), to deal in ImageMagick without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of ImageMagick, and to permit persons to whom the ImageMagick 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 ImageMagick. 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 ImageMagick Studio 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 ImageMagick or the use or other dealings in ImageMagick. Except as contained in this notice, the name of the ImageMagick Studio LLC shall not be used in advertising or otherwise to promote the sale, use or other dealings in ImageMagick without prior written authorization from the ImageMagick Studio.
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