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<h1>Module fx Methods</h1>
<p class="navigation-index">[<a href="fx.html#AddNoiseImage">AddNoiseImage</a> &bull; <a href="fx.html#BlueShiftImage">BlueShiftImage</a> &bull; <a href="fx.html#CharcoalImage">CharcoalImage</a> &bull; <a href="fx.html#ColorizeImage">ColorizeImage</a> &bull; <a href="fx.html#ColorMatrixImage">ColorMatrixImage</a> &bull; <a href="fx.html#FxImage">FxImage</a> &bull; <a href="fx.html#ImplodeImage">ImplodeImage</a> &bull; <a href="fx.html#The MorphImages">The MorphImages</a> &bull; <a href="fx.html#PlasmaImage">PlasmaImage</a> &bull; <a href="fx.html#PolaroidImage">PolaroidImage</a> &bull; <a href="fx.html#MagickSepiaToneImage">MagickSepiaToneImage</a> &bull; <a href="fx.html#ShadowImage">ShadowImage</a> &bull; <a href="fx.html#SketchImage">SketchImage</a> &bull; <a href="fx.html#SolarizeImage">SolarizeImage</a> &bull; <a href="fx.html#SteganoImage">SteganoImage</a> &bull; <a href="fx.html#StereoAnaglyphImage">StereoAnaglyphImage</a> &bull; <a href="fx.html#SwirlImage">SwirlImage</a> &bull; <a href="fx.html#TintImage">TintImage</a> &bull; <a href="fx.html#VignetteImage">VignetteImage</a> &bull; <a href="fx.html#WaveImage">WaveImage</a>]</p>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="AddNoiseImage">AddNoiseImage</a></h2>
<div class="doc-section">
<p>AddNoiseImage() adds random noise to the image.</p>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>channel</h5>
<p>the channel type.</p>
<h5>noise_type</h5>
<p>The type of noise: Uniform, Gaussian, Multiplicative, Impulse, Laplacian, or Poisson.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>factor</h5>
<p>the shift factor.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>radius</h5>
<p>the radius of the pixel neighborhood.</p>
<h5>sigma</h5>
<p>the standard deviation of the Gaussian, in pixels.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>opacity</h5>
<p>A character string indicating the level of opacity as a percentage.</p>
<h5>colorize</h5>
<p>A color value.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>color_matrix</h5>
<p>the color matrix.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="FxImage">FxImage</a></h2>
<div class="doc-section">
<p>FxImage() applies a mathematical expression to the specified image.</p>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>channel</h5>
<p>the channel.</p>
<h5>expression</h5>
<p>A mathematical expression.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>implode_image</h5>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>amount</h5>
<p>Define the extent of the implosion.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<p>The format of the MorphImage method is:</p>
<pre class="code">
Image *MorphImages(const Image *image,const size_t number_frames,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>number_frames</h5>
<p>Define the number of in-between image to generate. The more in-between frames, the smoother the morph.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<p>The format of the PlasmaImage method is:</p>
<pre class="code">
MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
size_t attenuate,size_t depth)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>segment</h5>
<p> Define the region to apply plasma fractals values.</p>
<h5>attenuate</h5>
<p>Define the plasma attenuation factor.</p>
<h5>depth</h5>
<p>Limit the plasma recursion depth.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="PolaroidImage">PolaroidImage</a></h2>
<div class="doc-section">
<p>PolaroidImage() simulates a Polaroid picture.</p>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>draw_info</h5>
<p>the draw info.</p>
<h5>angle</h5>
<p>Apply the effect along this angle.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>threshold</h5>
<p>the tone threshold.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="ShadowImage">ShadowImage</a></h2>
<div class="doc-section">
<p>ShadowImage() simulates a shadow from the specified image and returns it.</p>
<p>The format of the ShadowImage method is:</p>
<pre class="code">
Image *ShadowImage(const Image *image,const double opacity,
const double sigma,const ssize_t x_offset,const ssize_t y_offset,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>opacity</h5>
<p>percentage transparency.</p>
<h5>sigma</h5>
<p>the standard deviation of the Gaussian, in pixels.</p>
<h5>x_offset</h5>
<p>the shadow x-offset.</p>
<h5>y_offset</h5>
<p>the shadow y-offset.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>radius</h5>
<p>the radius of the Gaussian, in pixels, not counting the center pixel.</p>
<h5>sigma</h5>
<p>the standard deviation of the Gaussian, in pixels.</p>
<h5>angle</h5>
<p>Apply the effect along this angle.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>threshold</h5>
<p>Define the extent of the solarization.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>watermark</h5>
<p>the watermark image.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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 ssize_t x_offset,const ssize_t y_offset,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>left_image</h5>
<p>the left image.</p>
<h5>right_image</h5>
<p>the right image.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
<h5>x_offset</h5>
<p>amount, in pixels, by which the left image is offset to the right of the right image.</p>
<h5>y_offset</h5>
<p>amount, in pixels, by which the left image is offset to the bottom of the right image.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>degrees</h5>
<p>Define the tightness of the swirling effect.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>opacity</h5>
<p>A color value used for tinting.</p>
<h5>tint</h5>
<p>A color value used for tinting.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="VignetteImage">VignetteImage</a></h2>
<div class="doc-section">
<p>VignetteImage() softens the edges of the image in vignette style.</p>
<p>The format of the VignetteImage method is:</p>
<pre class="code">
Image *VignetteImage(const Image *image,const double radius,
const double sigma,const ssize_t x,const ssize_t y,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<h5>image</h5>
<p>the image.</p>
<h5>radius</h5>
<p>the radius of the pixel neighborhood.</p>
<h5>sigma</h5>
<p>the standard deviation of the Gaussian, in pixels.</p>
<h5>x, y</h5>
<p>Define the x and y ellipse offset.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
<h2><a href="http://www.imagemagick.org/api/MagickCore/fx_8c.html" id="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>
<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>
<h5>image</h5>
<p>the image.</p>
<h5>amplitude, wave_length</h5>
<p>Define the amplitude and wave length of the sine wave.</p>
<h5>exception</h5>
<p>return any errors or warnings in this structure.</p>
</div>
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