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  <title>ImageMagick: MagickCore, C API for ImageMagick: Add a Special Effect</title>
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<div class="main">

<p class="navigation-index">[<a href="#AddNoiseImage">AddNoiseImage</a> &bull; <a href="#BlueShiftImage">BlueShiftImage</a> &bull; <a href="#CharcoalImage">CharcoalImage</a> &bull; <a href="#ColorizeImage">ColorizeImage</a> &bull; <a href="#ColorMatrixImage">ColorMatrixImage</a> &bull; <a href="#FxImage">FxImage</a> &bull; <a href="#ImplodeImage">ImplodeImage</a> &bull; <a href="#The MorphImages">The MorphImages</a> &bull; <a href="#PlasmaImage">PlasmaImage</a> &bull; <a href="#PolaroidImage">PolaroidImage</a> &bull; <a href="#MagickSepiaToneImage">MagickSepiaToneImage</a> &bull; <a href="#ShadowImage">ShadowImage</a> &bull; <a href="#SketchImage">SketchImage</a> &bull; <a href="#SolarizeImage">SolarizeImage</a> &bull; <a href="#SteganoImage">SteganoImage</a> &bull; <a href="#StereoAnaglyphImage">StereoAnaglyphImage</a> &bull; <a href="#SwirlImage">SwirlImage</a> &bull; <a href="#TintImage">TintImage</a> &bull; <a href="#VignetteImage">VignetteImage</a> &bull; <a href="#WaveImage">WaveImage</a>]</p>

<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="AddNoiseImage">AddNoiseImage</a></h2>
<div class="doc-section">

<p>AddNoiseImage() adds random noise to the image.</p></ol>

<p>The format of the AddNoiseImage method is:</p>

<pre class="code">
  Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
    ExceptionInfo *exception)
  Image *AddNoiseImageChannel(const Image *image,const ChannelType channel,
    const NoiseType noise_type,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>channel</h5>
<ol><p>the channel type.</p></ol>

<h5>noise_type</h5>
<ol><p>The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="BlueShiftImage">BlueShiftImage</a></h2>
<div class="doc-section">

<p>BlueShiftImage() mutes the colors of the image to simulate a scene at nighttime in the moonlight.</p></ol>

<p>The format of the BlueShiftImage method is:</p>

<pre class="code">
  Image *BlueShiftImage(const Image *image,const double factor,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>factor</h5>
<ol><p>the shift factor.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="CharcoalImage">CharcoalImage</a></h2>
<div class="doc-section">

<p>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></ol>

<p>The format of the CharcoalImage method is:</p>

<pre class="code">
  Image *CharcoalImage(const Image *image,const double radius,
    const double sigma,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>radius</h5>
<ol><p>the radius of the pixel neighborhood.</p></ol>

<h5>sigma</h5>
<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="ColorizeImage">ColorizeImage</a></h2>
<div class="doc-section">

<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></ol>

<p>The format of the ColorizeImage method is:</p>

<pre class="code">
  Image *ColorizeImage(const Image *image,const char *opacity,
    const PixelPacket colorize,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>opacity</h5>
<ol><p>A character string indicating the level of opacity as a percentage.</p></ol>

<h5>colorize</h5>
<ol><p>A color value.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="ColorMatrixImage">ColorMatrixImage</a></h2>
<div class="doc-section">

<p>ColorMatrixImage() applies color transformation to an image. This method permits saturation changes, hue rotation, luminance to alpha, and various other effects.  Although variable-sized transformation matrices can be used, typically one uses a 5x5 matrix for an RGBA image and a 6x6 for CMYKA (or RGBA with offsets).  The matrix is similar to those used by Adobe Flash except offsets are in column 6 rather than 5 (in support of CMYKA images) and offsets are normalized (divide Flash offset by 255).</p></ol>

<p>The format of the ColorMatrixImage method is:</p>

<pre class="code">
  Image *ColorMatrixImage(const Image *image,
    const KernelInfo *color_matrix,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>color_matrix</h5>
<ol><p>the color matrix.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="FxImage">FxImage</a></h2>
<div class="doc-section">

<p>FxImage() applies a mathematical expression to the specified image.</p></ol>

<p>The format of the FxImage method is:</p>

<pre class="code">
  Image *FxImage(const Image *image,const char *expression,
    ExceptionInfo *exception)
  Image *FxImageChannel(const Image *image,const ChannelType channel,
    const char *expression,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>channel</h5>
<ol><p>the channel.</p></ol>

<h5>expression</h5>
<ol><p>A mathematical expression.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="ImplodeImage">ImplodeImage</a></h2>
<div class="doc-section">

<p>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></ol>

<p>The format of the ImplodeImage method is:</p>

<pre class="code">
  Image *ImplodeImage(const Image *image,const double amount,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>implode_image</h5>
<ol><p>Method ImplodeImage returns a pointer to the image after it is implode.  A null image is returned if there is a memory shortage.</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>amount</h5>
<ol><p>Define the extent of the implosion.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="The MorphImages">The MorphImages</a></h2>
<div class="doc-section">

<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></ol>

<p>The format of the MorphImage method is:</p>

<pre class="code">
  Image *MorphImages(const Image *image,const unsigned long number_frames,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>number_frames</h5>
<ol><p>Define the number of in-between image to generate. The more in-between frames, the smoother the morph.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="PlasmaImage">PlasmaImage</a></h2>
<div class="doc-section">

<p>PlasmaImage() initializes an image with plasma fractal values.  The image must be initialized with a base color and the random number generator seeded before this method is called.</p></ol>

<p>The format of the PlasmaImage method is:</p>

<pre class="code">
  MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
    unsigned long attenuate,unsigned long depth)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>segment</h5>
<ol><p> Define the region to apply plasma fractals values.</p></ol>

<h5>attenuate</h5>
<ol><p>Define the plasmattenuation factor.</p></ol>

<h5>depth</h5>
<ol><p>Limit the plasma recursion depth.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="PolaroidImage">PolaroidImage</a></h2>
<div class="doc-section">

<p>PolaroidImage() simulates a Polaroid picture.</p></ol>

<p>The format of the AnnotateImage method is:</p>

<pre class="code">
  Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
    const double angle,ExceptionInfo exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>draw_info</h5>
<ol><p>the draw info.</p></ol>

<h5>angle</h5>
<ol><p>Apply the effect along this angle.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="MagickSepiaToneImage">MagickSepiaToneImage</a></h2>
<div class="doc-section">

<p>MagickSepiaToneImage() applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning.  Threshold ranges from 0 to QuantumRange and is a measure of the extent of the sepia toning.  A threshold of 80 is a good starting point for a reasonable tone.</p></ol>

<p>The format of the SepiaToneImage method is:</p>

<pre class="code">
  Image *SepiaToneImage(const Image *image,const double threshold,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>threshold</h5>
<ol><p>the tone threshold.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="ShadowImage">ShadowImage</a></h2>
<div class="doc-section">

<p>ShadowImage() simulates a shadow from the specified image and returns it.</p></ol>

<p>The format of the ShadowImage method is:</p>

<pre class="code">
  Image *ShadowImage(const Image *image,const double opacity,
    const double sigma,const long x_offset,const long y_offset,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>opacity</h5>
<ol><p>percentage transparency.</p></ol>

<h5>sigma</h5>
<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>

<h5>x_offset</h5>
<ol><p>the shadow x-offset.</p></ol>

<h5>y_offset</h5>
<ol><p>the shadow y-offset.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="SketchImage">SketchImage</a></h2>
<div class="doc-section">

<p>SketchImage() simulates a pencil sketch.  We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma).  For reasonable results, radius should be larger than sigma.  Use a radius of 0 and SketchImage() selects a suitable radius for you.  Angle gives the angle of the sketch.</p></ol>

<p>The format of the SketchImage method is:</p>

<pre class="code">
      Image *SketchImage(const Image *image,const double radius,
  const double sigma,const double angle,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>radius</h5>
<ol><p>the radius of the Gaussian, in pixels, not counting the center pixel.</p></ol>

<h5>sigma</h5>
<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>

<h5>angle</h5>
<ol><p>Apply the effect along this angle.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="SolarizeImage">SolarizeImage</a></h2>
<div class="doc-section">

<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 QuantumRange and is a measure of the extent of the solarization.</p></ol>

<p>The format of the SolarizeImage method is:</p>

<pre class="code">
  MagickBooleanType SolarizeImage(Image *image,const double threshold)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>threshold</h5>
<ol><p>Define the extent of the solarization.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="SteganoImage">SteganoImage</a></h2>
<div class="doc-section">

<p>SteganoImage() hides 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></ol>

<p>The format of the SteganoImage method is:</p>

<pre class="code">
  Image *SteganoImage(const Image *image,Image *watermark,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>watermark</h5>
<ol><p>the watermark image.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="StereoAnaglyphImage">StereoAnaglyphImage</a></h2>
<div class="doc-section">

<p>StereoAnaglyphImage() 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></ol>

<p>The format of the StereoAnaglyphImage method is:</p>

<pre class="code">
  Image *StereoImage(const Image *left_image,const Image *right_image,
    ExceptionInfo *exception)
  Image *StereoAnaglyphImage(const Image *left_image,
    const Image *right_image,const long x_offset,const long y_offset,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>left_image</h5>
<ol><p>the left image.</p></ol>

<h5>right_image</h5>
<ol><p>the right image.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

<h5>x_offset</h5>
<ol><p>amount, in pixels, by which the left image is offset to the right of the right image.</p></ol>

<h5>y_offset</h5>
<ol><p>amount, in pixels, by which the left image is offset to the bottom of the right image.</p></ol>


 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="SwirlImage">SwirlImage</a></h2>
<div class="doc-section">

<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></ol>

<p>The format of the SwirlImage method is:</p>

<pre class="code">
  Image *SwirlImage(const Image *image,double degrees,
    ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>degrees</h5>
<ol><p>Define the tightness of the swirling effect.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="TintImage">TintImage</a></h2>
<div class="doc-section">

<p>TintImage() applies a color vector to each pixel in the image.  The length of the vector is 0 for black and white and at its maximum for the midtones. The vector weighting function is f(x)=(1-(4.0*((x-0.5)*(x-0.5))))</p></ol>

<p>The format of the TintImage method is:</p>

<pre class="code">
  Image *TintImage(const Image *image,const char *opacity,
    const PixelPacket tint,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>opacity</h5>
<ol><p>A color value used for tinting.</p></ol>

<h5>tint</h5>
<ol><p>A color value used for tinting.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="VignetteImage">VignetteImage</a></h2>
<div class="doc-section">

<p>VignetteImage() softens the edges of the image in vignette style.</p></ol>

<p>The format of the VignetteImage method is:</p>

<pre class="code">
  Image *VignetteImage(const Image *image,const double radius,
    const double sigma,const long x,const long y,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>radius</h5>
<ol><p>the radius of the pixel neighborhood.</p></ol>

<h5>sigma</h5>
<ol><p>the standard deviation of the Gaussian, in pixels.</p></ol>

<h5>x, y</h5>
<ol><p>Define the x and y ellipse offset.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx
_8c.html" target="source" name="WaveImage">WaveImage</a></h2>
<div class="doc-section">

<p>WaveImage() 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></ol>

<p>The format of the WaveImage method is:</p>

<pre class="code">
  Image *WaveImage(const Image *image,const double amplitude,
    const double wave_length,ExceptionInfo *exception)
</pre>

<p>A description of each parameter follows:</p></ol>

<h5>image</h5>
<ol><p>the image.</p></ol>

<h5>amplitude, wave_length</h5>
<ol><p>Define the amplitude and wave length of the sine wave.</p></ol>

<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>

 </div>

</div>

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