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-
+<h1>ImageMagick Image Composition</h1>
<p>This page descibed the Image composition methods that is used to define how
two images should be merged together in various image operations. For the
Command Line API it is typically set using the <A
this behaviour. </p>
<p>On top of the above 12 Duff-Porter Alpha Composition methods, one special
-related method '<kbd>Copy</kbd>' has been provided. This is equivelent to
+related method '<kbd>Copy</kbd>' has been provided. This is equivalent to
using the '<kbd>Src</kbd>' with the special <A HREF="../www/command-line-options.html#define"
>-define</A> option '<kbd>compose:outside-overlay</kbd>' set to
'<kbd>false</kbd>', so as to only modify the overlaid area, without clearing
<p>As of IM v6.6.1-6, if the special '<kbd>Sync</kbd>' flag is not specified
(enabled by default) with the <a href="../www/command-line-options.html#channel"
>-channel</a> setting, then the above mathematical compositions will nolonger
-syncronise its actions with the alpha channel. Instead the math composition
+synchronise its actions with the alpha channel. Instead the math composition
will be applied on an individual channel basis as defined by the <a
href="../www/command-line-options.html#channel"
>-channel</a>. This includes the alpha channel. This special usage
<tr valign="top">
<td valign="top">linear-dodge</td>
- <td valign="top">This is equivelent to 'Plus' in that the color channels
+ <td valign="top">This is equivalent to 'Plus' in that the color channels
are simply added, however it does not 'Plus' the alpha channel, but
uses the normal 'Over' alpha blending, which transparencies are
involved. Produces a sort of additive multiply-like result. Added
<tr valign="top">
<td valign="top">pegtop-light</td>
- <td valign="top">Almost equivelent to 'Soft-Light', but using a
+ <td valign="top">Almost equivalent to 'Soft-Light', but using a
continuious mathematical formula rather than two conditionally
selected formulae. Added ImageMagick version 6.5.4-3. </td>
</tr>
<tr valign="top">
<td valign="top">copy</td>
- <td valign="top">This is equivelent to the Duff-Porter composition method
+ <td valign="top">This is equivalent to the Duff-Porter composition method
'<kbd>Src,</kbd>' but without clearing the parts of the destination
image that is not overlaid. </td>
</tr>
attribute of '<kbd class="arg">compose:args</kbd>'. This means you can now
make use of these special argumented <a href="../www/command-line-options.html#compose"
>-compose</a> methods, those the argument and the method both need to be set
-separatally. For example... </p>
+separately. For example... </p>
<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert ... -compose blend -define compose:args=50,50 -composite ...</span></p>
<p>The following is a table of these special 'argumented' compose methods,
each point of the overlaid area. Much like the displacement map is a
'lens' that distorts the original 'background' image behind it.
<br><br>
- The X-scale is modilated by the 'red' channel of the overlay image
+ The X-scale is modulated by the 'red' channel of the overlay image
while the Y-scale is modulated by the green channel, (the mask image
if given is rolled into green channel of the overlay image. This
separation allows you to modulate the X and Y lookup displacement
- separatally allowing you to di 2 dimentional displacements, rather
- than 1 dimentional verctored displacements (using grayscale image).
+ separately allowing you to do 2-dimensional displacements, rather
+ than 1-dimensional verctored displacements (using grayscale image).
<br><br>
If the overlay image contains transparency this is used as a mask
of the resulting image to remove 'invalid' pixels.
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