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About ImageMagick
Command-line Tools
Program Interfaces
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Use the composite program overlaps one image over another. See Command Line Processing for advice on how to structure your composite command or see below for example usages of the command. We list a few examples of the composite command here to illustrate its usefulness and ease of use. To get started, lets overlay a letter over a a rose: composite -gravity center smile.gif rose: rose-over.png You can create three-dimensional effect with the Atop: convert -size 70x70 xc:none -fill red -draw 'circle 35,35 10,30' red-circle.png convert -size 70x70 xc:none -draw 'circle 35,35 35,20' -negate -channel A -gaussian 0x8 white-highlight.png composite -compose atop -geometry -13-17 white-highlight.png red-circle.png red-ball.png You can find additional examples of using composite in Examples of ImageMagick Usage. You can find out more about them and the mathematics by looking at SVG Alpha Compositing The composite command recognizes these options. Click on an option to get more details about how that option works.
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