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<div class="document" id="fx">
<h1 class="title">fx</h1>
<h2 class="subtitle" id="image-special-effects-methods">Image special effects methods</h2>
<div class="contents topic" id="contents">
<p class="topic-title first">Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#charcoalimage" id="id21">CharcoalImage</a></li>
<li><a class="reference internal" href="#colorizeimage" id="id22">ColorizeImage</a></li>
<li><a class="reference internal" href="#colormatriximage" id="id23">ColorMatrixImage</a></li>
<li><a class="reference internal" href="#implodeimage" id="id24">ImplodeImage</a></li>
<li><a class="reference internal" href="#morphimages" id="id25">MorphImages</a></li>
<li><a class="reference internal" href="#oilpaintimage" id="id26">OilPaintImage</a></li>
<li><a class="reference internal" href="#solarizeimage" id="id27">SolarizeImage</a></li>
<li><a class="reference internal" href="#steganoimage" id="id28">SteganoImage</a></li>
<li><a class="reference internal" href="#stereoimage" id="id29">StereoImage</a></li>
<li><a class="reference internal" href="#swirlimage" id="id30">SwirlImage</a></li>
<li><a class="reference internal" href="#waveimage" id="id31">WaveImage</a></li>
</ul>
</div>
<div class="section" id="charcoalimage">
<h1><a class="toc-backref" href="#id21">CharcoalImage</a></h1>
<div class="section" id="synopsis">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *CharcoalImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double radius, const double sigma,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="description">
<h2>Description</h2>
<p>Method CharcoalImage creates a new image that is a copy of an existing
one with the edge highlighted. It allocates the memory necessary for the
new Image structure and returns a pointer to the new image.</p>
<p>The format of the CharcoalImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *CharcoalImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double radius, const double sigma,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>charcoal_image:</dt>
<dd>Method CharcoalImage returns a pointer to the image
after it is embossed. A null image is returned if there is a memory
shortage.</dd>
<dt>image:</dt>
<dd>The image.</dd>
<dt>radius:</dt>
<dd>the radius of the pixel neighborhood.</dd>
<dt>sigma:</dt>
<dd>The standard deviation of the Gaussian, in pixels.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="colorizeimage">
<h1><a class="toc-backref" href="#id22">ColorizeImage</a></h1>
<div class="section" id="id1">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *ColorizeImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const char *opacity,
const <a class="reference external" href="../api/types.html#pixelpacket">PixelPacket</a> target, <a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id2">
<h2>Description</h2>
<p>ColorizeImage() blends the fill color with each pixel in the image.
A percentage blend is specified with opacity. Control the application
of different color components by specifying a different percentage for
each component (e.g. 90/100/10 is 90% red, 100% green, and 10% blue).</p>
<p>The format of the ColorizeImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *ColorizeImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const char *opacity,
const <a class="reference external" href="../api/types.html#pixelpacket">PixelPacket</a> target, <a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>opacity:</dt>
<dd>A character string indicating the level of opacity as a
percentage.</dd>
<dt>target:</dt>
<dd>A color value.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="colormatriximage">
<h1><a class="toc-backref" href="#id23">ColorMatrixImage</a></h1>
<div class="section" id="id3">
<h2>Synopsis</h2>
<pre class="literal-block">
MagickPassFail ColorMatrixImage( <a class="reference external" href="../api/types.html#image">Image</a> *image, const unsigned int order,
const double *color_matrix );
</pre>
</div>
<div class="section" id="id4">
<h2>Description</h2>
<p>ColorMatrixImage() applies a color matrix to the image channels. The
user supplied matrix may be of order 1 to 5 (1x1 through 5x5) and is
used to update the default identity matrix:</p>
<p>1 0 0 0 0
0 1 0 0 0
0 0 1 0 0
0 0 0 1 0
0 0 0 0 1</p>
<p>where the first four columns represent the ratio of the color (red,
green, blue) and opacity components incorporated in the output summation.
The first four rows represent the summations for red, green, blue, and
opacity. The last row is a dummy row and is not used. The last column
represents a constant value (expressed as a ratio of MaxRGB) to be
added to the row summation. The following is a summary of how the
matrix is applied:</p>
<p>r' = r*m[0,0] + g*m[1,0] + b*m[2,0] + o*m[3,0] + MaxRGB*m[4,0]
g' = r*m[0,1] + g*m[1,1] + b*m[2,1] + o*m[3,1] + MaxRGB*m[4,1]
b' = r*m[0,2] + g*m[1,2] + b*m[2,2] + o*m[3,2] + MaxRGB*m[4,2]
o' = r*m[0,3] + g*m[1,3] + b*m[2,3] + o*m[3,3] + MaxRGB*m[4,3]</p>
<p>The format of the ColorMatrixImage method is:</p>
<pre class="literal-block">
MagickPassFail ColorMatrixImage( <a class="reference external" href="../api/types.html#image">Image</a> *image, const unsigned int order,
const double *color_matrix );
</pre>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>order:</dt>
<dd>The number of columns and rows in the filter kernel.</dd>
<dt>matrix:</dt>
<dd>An array of double representing the matrix</dd>
</dl>
</div>
</div>
<div class="section" id="implodeimage">
<h1><a class="toc-backref" href="#id24">ImplodeImage</a></h1>
<div class="section" id="id5">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *ImplodeImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double amount,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id6">
<h2>Description</h2>
<p>Method ImplodeImage creates a new image that is a copy of an existing
one with the image pixels "implode" by the specified percentage. It
allocates the memory necessary for the new Image structure and returns a
pointer to the new image.</p>
<p>The format of the ImplodeImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *ImplodeImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double amount,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>implode_image:</dt>
<dd>Method ImplodeImage returns a pointer to the image
after it is implode. A null image is returned if there is a memory
shortage.</dd>
<dt>image:</dt>
<dd>The image.</dd>
<dt>amount:</dt>
<dd>Define the extent of the implosion.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="morphimages">
<h1><a class="toc-backref" href="#id25">MorphImages</a></h1>
<div class="section" id="id7">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *MorphImages( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const unsigned long number_frames,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id8">
<h2>Description</h2>
<p>The MorphImages() method requires a minimum of two images. The first
image is transformed into the second by a number of intervening images
as specified by frames.</p>
<p>The format of the MorphImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *MorphImages( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const unsigned long number_frames,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>number_frames:</dt>
<dd>Define the number of in-between image to generate.
The more in-between frames, the smoother the morph.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="oilpaintimage">
<h1><a class="toc-backref" href="#id26">OilPaintImage</a></h1>
<div class="section" id="id9">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *OilPaintImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double radius,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id10">
<h2>Description</h2>
<p>OilPaintImage() applies a special effect filter that simulates an oil
painting. Each pixel is replaced by the most frequent color occurring
in a circular region defined by radius.</p>
<p>The format of the OilPaintImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *OilPaintImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double radius,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>radius:</dt>
<dd>The radius of the circular neighborhood.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="solarizeimage">
<h1><a class="toc-backref" href="#id27">SolarizeImage</a></h1>
<div class="section" id="id11">
<h2>Synopsis</h2>
<pre class="literal-block">
unsigned int SolarizeImage( <a class="reference external" href="../api/types.html#image">Image</a> *image, const double threshold );
</pre>
</div>
<div class="section" id="id12">
<h2>Description</h2>
<p>SolarizeImage() applies a special effect to the image, similar to the effect
achieved in a photo darkroom by selectively exposing areas of photo
sensitive paper to light. Threshold ranges from 0 to MaxRGB and is a
measure of the extent of the solarization. False is returned if an error
is encountered.</p>
<p>The format of the SolarizeImage method is:</p>
<pre class="literal-block">
unsigned int SolarizeImage( <a class="reference external" href="../api/types.html#image">Image</a> *image, const double threshold );
</pre>
<p>A description of each parameter follows:</p>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>threshold:</dt>
<dd>Define the extent of the solarization.</dd>
</dl>
</div>
</div>
<div class="section" id="steganoimage">
<h1><a class="toc-backref" href="#id28">SteganoImage</a></h1>
<div class="section" id="id13">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *SteganoImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, <a class="reference external" href="../api/types.html#image">Image</a> *watermark,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id14">
<h2>Description</h2>
<p>Use SteganoImage() to hide a digital watermark within the image.
Recover the hidden watermark later to prove that the authenticity of
an image. Offset defines the start position within the image to hide
the watermark.</p>
<p>The format of the SteganoImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *SteganoImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, <a class="reference external" href="../api/types.html#image">Image</a> *watermark,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>watermark:</dt>
<dd>The watermark image.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="stereoimage">
<h1><a class="toc-backref" href="#id29">StereoImage</a></h1>
<div class="section" id="id15">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *StereoImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const <a class="reference external" href="../api/types.html#image">Image</a> *offset_image,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id16">
<h2>Description</h2>
<p>StereoImage() combines two images and produces a single image that is the
composite of a left and right image of a stereo pair. Special red-green
stereo glasses are required to view this effect.</p>
<p>The format of the StereoImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *StereoImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const <a class="reference external" href="../api/types.html#image">Image</a> *offset_image,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>stereo_image:</dt>
<dd>Method StereoImage returns a pointer to the stereo
image. A null image is returned if there is a memory shortage.</dd>
<dt>image:</dt>
<dd>The image.</dd>
<dt>offset_image:</dt>
<dd>Another image.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="swirlimage">
<h1><a class="toc-backref" href="#id30">SwirlImage</a></h1>
<div class="section" id="id17">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *SwirlImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, double degrees, <a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id18">
<h2>Description</h2>
<p>SwirlImage() swirls the pixels about the center of the image, where
degrees indicates the sweep of the arc through which each pixel is moved.
You get a more dramatic effect as the degrees move from 1 to 360.</p>
<p>The format of the SwirlImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *SwirlImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, double degrees, <a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>degrees:</dt>
<dd>Define the tightness of the swirling effect.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
<div class="section" id="waveimage">
<h1><a class="toc-backref" href="#id31">WaveImage</a></h1>
<div class="section" id="id19">
<h2>Synopsis</h2>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *WaveImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double amplitude, const double wave_length,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
</div>
<div class="section" id="id20">
<h2>Description</h2>
<p>The WaveImage() filter creates a "ripple" effect in the image by shifting
the pixels vertically along a sine wave whose amplitude and wavelength
is specified by the given parameters.</p>
<p>The format of the WaveImage method is:</p>
<pre class="literal-block">
<a class="reference external" href="../api/types.html#image">Image</a> *WaveImage( const <a class="reference external" href="../api/types.html#image">Image</a> *image, const double amplitude, const double wave_length,
<a class="reference external" href="../api/types.html#exceptioninfo">ExceptionInfo</a> *exception );
</pre>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>amplitude, frequency:</dt>
<dd>Define the amplitude and wave_length of the
sine wave.</dd>
<dt>exception:</dt>
<dd>Return any errors or warnings in this structure.</dd>
</dl>
</div>
</div>
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