MagickStudio/Transform.html at main · ImageMagick/MagickStudio · GitHub

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<title>Image Transforms</title>
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<body bgcolor="#FFFFFF" text="#000000" link="#0085C0"
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<center><img src="images/magick.png" align="bottom" width="114"
height="113" /></center>
<hr />
<p>You have your choice of these image enhancements:</p>
<dl>
<dd>
<dl>
<dt><b>affine</b></dt>
<dd>affine transform image. The parameter has this format:
<pre>
    <i>sx, rx, ry, sy, tx, ty</i>
</pre></dd><br />
<dt><b>Crop</b></dt>
<dd>preferred size and location of the cropped image. The parameter
has this format:
<pre>
    <i>&lt;width&gt;x&lt;height&gt;{+-}&lt;x offset&gt;{+-}&lt;y offset&gt;{%}</i>
</pre>
<p>For example, <tt>100x200+20+10</tt>.</p>
<p>To specify a percentage width or height instead, append
<b>%</b>. For example to crop the image by ten percent on all sides
of the image, use <b>10%</b>.</p>
<p>Use cropping to apply image processing options to, or display, a
particular area of an image. Omit the x and y offset to generate
one or more subimages of a uniform size.</p></dd><br />
<dt><b>Chop</b></dt>
<dd>preferred size and location of the chopped image. See
<b>crop</b> for the parameter requirements. Use this transform to
remove a section of the image from it's interior. If you remove
from the exterior of the image, <b>chop</b> behaves like
<b>crop</b>.</dd><br />
<dt><b>Coalesce</b></dt>
<dd>merge a sequence of images. Requires an image sequence.</dd><br />
<dt><b>Deconstruct</b></dt>
<dd>break down an image sequence into constituent parts. Requires
an image sequence.</dd><br />
<dt><b>Deskew</b></dt>
<dd>straighten an image. The parameter is the threshold (e.g. 40%).</dd><br />
<dt><b>Flip</b></dt>
<dd>create a <em>mirror image</em> by reflecting the image
scanlines in the vertical direction.</dd><br />
<dt><b>Flop</b></dt>
<dd>create a <em>mirror image</em> by reflecting the image
scanlines in the horizontal direction.</dd><br />
<dt><b>Layers</b></dt>
<dd>Optimize, merge, or compare image layers.  Requires an image sequence.</dd><br />
<dt><b>Rotate right</b></dt>
<dd>rotate the image right 90 degrees.</dd><br />
<dt><b>Rotate left</b></dt>
<dd>rotate the image right -90 degrees.</dd><br />
<dt><b>Rotate</b></dt>
<dd>apply Paeth image rotation to the image. The parameter has this
format:
<pre>
    <i>degrees{&lt;}{&gt;}</i>
</pre>
<p>Use <tt>&gt;</tt> to rotate the image only if its width exceeds
the height. <tt>&lt;</tt> rotates the image <i>only</i> if its
width is less than the height. For example, if you specify
<tt>-90&gt;</tt> and the image size is 480x640, the image is not
rotated by the specified angle. However, if the image is 640x480,
it is rotated by -90 degrees.</p></dd><br />
<dt><b>Shave</b></dt>
<dd>shave pixels from the image edges. The parameter has this
format:
<pre>
    &lt;width&gt;x&lt;height&gt;
</pre></dd><br />
<dt><b>Shear</b></dt>
<dd>shear the image along the X or Y axis by a positive or negative
shear angle. The parameter has this format:
<pre>
    &lt;x degrees&gt;x&lt;y degrees&gt;
</pre>
<p>Shearing slides one edge of an image along the X or Y axis,
creating a parallelogram. An X direction shear slides an edge along
the X axis, while a Y direction shear slides an edge along the Y
axis. The amount of the shear is controlled by a shear angle. For X
direction shears, <i>x degrees</i> is measured relative to the Y
axis, and similarly, for Y direction shears <i>y degrees</i> is
measured relative to the X axis.</p></dd><br />
<dt><b>Roll</b></dt>
<dd>roll an image vertically or horizontally. The parameter has
this format:
<pre>
    {+-}&lt;x offset&gt;{+-}&lt;y offset&gt;
</pre>
<p>A negative <i>x offset</i> rolls the image left-to-right. A
negative <i>y offset</i> rolls the image top-to-bottom.</p></dd><br />
<dt><b>Trim</b></dt>
<dd>remove edges that are the background color.</dd><br />
<dt><b>Unique Colors</b></dt>
<dd>discard all but one of any pixel color.</dd><br />
</dl></dd><br /></dl>
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