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<p>ImageMagick utilizes multiple computational threads to increase performance and can read, process, or write mega-, giga-, or tera-pixel image sizes.</p>
<p>ImageMagick is free software delivered as a ready-to-run binary distribution or as source code that you may use, copy, modify, and distribute in both open and proprietary applications. It is distributed under the Apache 2.0 <a href="http://www.imagemagick.org/www/license.html">license</a>.</p>
-<p>The ImageMagick development process ensures a
stable API and ABI. Before each ImageMagick release, we perform a comprehensive security assessment that includes <a href="https://code.google.com/p/address-sanitizer/">memory error</a> and <a href="https://code.google.com/p/data-race-test/wiki/ThreadSanitizer">thread data race</a> detection to prevent security vulnerabilities.</p>
+<p>The ImageMagick development process ensures a
<a href="http://abi-laboratory.pro/tracker/timeline/imagemagick/">stable</a> API and ABI. Before each ImageMagick release, we perform a comprehensive security assessment that includes <a href="https://code.google.com/p/address-sanitizer/">memory error</a> and <a href="https://code.google.com/p/data-race-test/wiki/ThreadSanitizer">thread data race</a> detection to prevent security vulnerabilities.</p>
<p>The current release is ImageMagick <a href="http://www.imagemagick.org/www/binary-releases.html">7.0.0-0</a>. It runs on <a href="http://www.imagemagick.org/www/binary-releases.html#unix">Linux</a>, <a href="http://www.imagemagick.org/www/binary-releases.html#windows">Windows</a>, <a href="http://www.imagemagick.org/www/binary-releases.html#macosx">Mac Os X</a>, <a href="http://www.imagemagick.org/www/binary-releases.html#iOS">iOS</a>, Android OS, and others.</p>
<td><a href="www/command-line-processing.html">Command-line processing</a></td>
<td>utilize ImageMagick from the command-line.</td>
</tr>
+ <tr>
+ <td><a href="https://en.wikipedia.org/wiki/Complex_text_layout">Complex text layout</a></td>
+ <td>bidirectional text support and shaping.</td>
+ </tr>
<tr>
<td><a href="www/composite.html">Composite</a></td>
<td>overlap one image over another.</td>
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<h1> Magick::Image Class</h1>
-<p class="navigation-index">[<a href="Image++.html#BLOBs">BLOBs</a> • <a href="Image++.html#Constructors">Constructors</a> • <a href="Image++.html#Image%20Manipulation%20Methods">Image Manipulation Methods</a> • <a href="Image++.html#Image%20Attributes">Image Attributes</a> • <a href="Image++.html#Raw%20Image%20Pixel%20Access">Low-Level Image Pixel Access</a>]</p>
+<p class="navigation-index">[<a href="Image.html#BLOBs">BLOBs</a> • <a href="Image.html#Constructors">Constructors</a> • <a href="Image.html#Image%20Manipulation%20Methods">Image Manipulation Methods</a> • <a href="Image.html#Image%20Attributes">Image Attributes</a> • <a href="Image.html#Raw%20Image%20Pixel%20Access">Low-Level Image Pixel Access</a>]</p>
<div class="doc-section">
<p>Image is the primary object in Magick++ and represents
a single image frame (see <a href="http://www.imagemagick.org/Magick++/ImageDesign.html">design</a> ). The
file, reading the image from a database, memory-mapped from a disk
file, or could be written to memory by Magick++. Once the encoded image
has been placed within a Blob, it may be read into a Magick++ Image via
-a <a href="Image++.html#constructor_blob">constructor</a> or <a href="Image++.html#read">read()</a>
+a <a href="Image.html#constructor_blob">constructor</a> or <a href="Image.html#read">read()</a>
. Likewise, a Magick++ image may be written to a Blob via <a
- href="Image++.html#write"> write()</a> .
+ href="Image.html#write"> write()</a> .
<p>An example of using Image to write to a Blob follows: <br>
</p>
<pre class="code">
href="http://www.imagemagick.org/Magick++/Blob.html">Blob</a> &blob_</font></td>
<td rowspan="5"><font size="-1">Construct Image by reading from
encoded image data contained in an in-memory <a href="http://www.imagemagick.org/Magick++/Blob.html">BLOB</a>
-. Depending on the constructor arguments, the Blob <a href="Image++.html#size">size</a>
-, <a href="Image++.html#depth">depth</a> , <a href="Image++.html#magick">magick</a> (format)
+. Depending on the constructor arguments, the Blob <a href="Image.html#size">size</a>
+, <a href="Image.html#depth">depth</a> , <a href="Image.html#magick">magick</a> (format)
may
also be specified. Some image formats require that size be specified.
The default ImageMagick uses for depth depends on the compiled-in
match that of the image, the depth may need to be specified.
ImageMagick can usually automagically detect the image's format.
When a format can't be automagically detected, the format (<a
- href="Image++.html#magick">magick</a> ) must be specified.</font></td>
+ href="Image.html#magick">magick</a> ) must be specified.</font></td>
</tr>
<tr>
<td><font size="-1">const <a href="http://www.imagemagick.org/Magick++/Blob.html">Blob</a>
<td valign="middle"><font size="-1">const Image &reference_<br>
</font></td>
<td valign="top"><font size="-1">Compare current image with
-another image. Sets <a href="Image++.html#meanErrorPerPixel">meanErrorPerPixel</a>
-, <a href="Image
++.html#normalizedMaxError">normalizedMaxError</a> , and <a
- href="Image++.html#normalizedMeanError">normalizedMeanError</a> in the current
+another image. Sets <a href="Image.html#meanErrorPerPixel">meanErrorPerPixel</a>
+, <a href="Image.html#normalizedMaxError">normalizedMaxError</a> , and <a
+ href="Image.html#normalizedMeanError">normalizedMeanError</a> in the current
image. False is returned if the images are identical. An ErrorOption
exception is thrown if the reference image columns, rows, colorspace,
or
<td style="text-align: center;" rowspan="3">
<center><a name="composite"></a> <font size="-1">composite</font></center>
</td>
- <td><font size="-1">const <a href="http://www.imagemagick.org/Magick++/Image++.html">Image</a>
+ <td><font size="-1">const <a href="http://www.imagemagick.org/Magick++/Image.html">Image</a>
&compositeImage_, ssize_t xOffset_, ssize_t yOffset_, <a
href="http://www.imagemagick.org/Magick++/Enumerations.html#CompositeOperator"> CompositeOperator</a>
compose_ = <i>InCompositeOp</i></font></td>
composition algorithm specified by <i>compose_</i>. </font></td>
</tr>
<tr>
- <td><font size="-1">const <a href="http://www.imagemagick.org/Magick++/Image++.html">Image</a>
+ <td><font size="-1">const <a href="http://www.imagemagick.org/Magick++/Image.html">Image</a>
&compositeImage_, const <a href="http://www.imagemagick.org/Magick++/Geometry.html">Geometry</a>
&offset_, <a href="http://www.imagemagick.org/Magick++/Enumerations.html#CompositeOperator">CompositeOperator</a>
compose_ = <i>InCompositeOp</i></font></td>
specified by <i>compose_</i> . </font></td>
</tr>
<tr>
- <td><font size="-1">const <a href="http://www.imagemagick.org/Magick++/Image++.html">Image</a>
+ <td><font size="-1">const <a href="http://www.imagemagick.org/Magick++/Image.html">Image</a>
&compositeImage_, <a href="http://www.imagemagick.org/Magick++/Enumerations.html#GravityType">GravityType</a>
gravity_, <a href="http://www.imagemagick.org/Magick++/Enumerations.html#CompositeOperator">CompositeOperator</a>
compose_ = <i>InCompositeOp</i></font></td>
<td><font size="-1">const std::string &imageSpec_</font></td>
<td rowspan="2" nosave=""><font size="-1">Ping is similar to read
except only enough of the image is read to determine the image columns,
-rows, and filesize. The <a href="Image++.html#columns">columns</a> </font>,
- <font size="-1"><a href="Image
++.html#rows">rows</a> , and <a
- href="Image++.html#fileSize">fileSize</a>
+rows, and filesize. The <a href="Image.html#columns">columns</a> </font>,
+ <font size="-1"><a href="Image.html#rows">rows</a> , and <a
+ href="Image.html#fileSize">fileSize</a>
attributes are valid after invoking ping. The image data is not
valid after calling ping.</font></td>
</tr>
&thresholds_, const ChannelType channel_<br>
</small></td>
<td style="vertical-align: middle;"><small>Random threshold an
-image channel. Similar to <a href="Image++.html#randomThreshold">randomThreshold</a>()
+image channel. Similar to <a href="Image.html#randomThreshold">randomThreshold</a>()
but restricted to the specified channel.<br>
</small></td>
</tr>
<td rowspan="3"><font size="-1">Write image to a in-memory <a
href="http://www.imagemagick.org/Magick++/Blob.html"> BLOB</a> stored in <i>blob_</i>. The <i>magick</i>_
parameter specifies the image format to write (defaults to <a
- href="Image++.html#magick">magick</a> ). The depth_ parameter species the image
-depth (defaults to <a href="Image++.html#depth"> depth</a> ).</font> <br>
+ href="Image.html#magick">magick</a> ). The depth_ parameter species the image
+depth (defaults to <a href="Image.html#depth"> depth</a> ).</font> <br>
<font size="-1"><b><font color="#ff0000">Caution: </font></b> if
an image format is selected which is capable of supporting fewer
colors than the original image or quantization has been requested, the
href="http://www.imagemagick.org/Magick++/TypeMetric.html"> TypeMetric</a> *metrics</font></td>
<td bgcolor="#666666"><font size="-1"> </font></td>
<td><font size="-1">Update metrics with font type metrics using
-specified <i>text</i>, and current <a href="Image
++.html#font">font</a> and <a
- href="Image++.html#fontPointsize">fontPointSize</a> settings.</font></td>
+specified <i>text</i>, and current <a href="Image.html#font">font</a> and <a
+ href="Image.html#fontPointsize">fontPointSize</a> settings.</font></td>
</tr>
<tr>
<td>
<p><font size="-1">Use this option to specify the dimensions
and position of the Postscript page in dots per inch or a TEXT page in
pixels. This option is typically used in concert with <i><a
- href="Image++.html#density"> density</a> </i>.</font> </p>
+ href="Image.html#density"> density</a> </i>.</font> </p>
<p><font size="-1">Page may also be used to position a GIF
image (such as for a scene in an animation)</font></p>
</td>
<p>Obtain existing image pixels via <i>getPixels()</i>. Create a new
pixel region using <i>setPixels().</i></p>
<p>In order to ensure that only the current generation of the image is
-modified, the Image's <a href="Image++.html#modifyImage">modifyImage()</a> method
+modified, the Image's <a href="Image.html#modifyImage">modifyImage()</a> method
should be invoked to reduce the reference count on the underlying image
to one. If this is not done, then it is possible for a previous
generation of the image to be modified due to the use of reference
size="-1"> Only valid for PseudoClass images or CMYKA images. The
pixel indexes represent an array of type IndexPacket, with each entry
corresponding to an x,y pixel position. For PseudoClass images, the
-entry's value is the offset into the colormap (see <a href="Image++.html#colorMap">colorMap</a>
+entry's value is the offset into the colormap (see <a href="Image.html#colorMap">colorMap</a>
) for that pixel. For CMYKA images, the indexes are used to contain the
alpha channel.</font></td>
</tr>
<td><font size="-1">void</font></td>
<td><font size="-1">Returns a pointer to the Image pixel indexes
corresponding to the pixel region requested by the last <a
- href="Image++.html#getConstPixels">getConstPixels</a> , <a href="Image++.html#getPixels">getPixels</a>
-, or <a href="Image++.html#setPixels">setPixels</a> call. </font><font
+ href="Image.html#getConstPixels">getConstPixels</a> , <a href="Image.html#getPixels">getPixels</a>
+, or <a href="Image.html#setPixels">setPixels</a> call. </font><font
size="-1">The
returned pointer remains valid until the next getPixel, getConstPixels,
or setPixels call and should never be deallocated by the user.</font><font
CMYKA images. The pixel indexes represent an array of type
IndexPacket, with each entry corresponding to a pixel x,y position. For
PseudoClass images, the entry's value is the offset into the colormap
-(see <a href="Image++.html#colorMap">colorMap</a> ) for that pixel. For
+(see <a href="Image.html#colorMap">colorMap</a> ) for that pixel. For
CMYKA
images, the indexes are used to contain the alpha channel.</font></td>
</tr>
<a href="../links.html">Related</a> •
<a href="../architecture.html">Architecture</a>
</p>
- <p><a href="Image++.html#">Back to top</a> •
+ <p><a href="Image.html#">Back to top</a> •
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<p>The format of the GetImageMask method is:</p>
<pre class="text">
-Image *GetImageMask(const Image *image,ExceptionInfo *exception)
+Image *GetImageMask(const Image *image,const PixelMask type,
+ ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dt>image</dt>
<dd>the image. </dd>
+<dd> </dd>
+<dt>type</dt>
+<dd>the mask type, ReadPixelMask or WritePixelMask. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickCore/image_8c.html" id="GetImageVirtualPixelMethod">GetImageVirtualPixelMethod</a></h2>
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<div class="doc-section">
<p><a href="http://www.imagemagick.org/Magick++">Magick++</a> provides a simple C++ API to the ImageMagick image processing library which supports reading and writing a huge number of image formats as well as supporting a broad spectrum of traditional image processing operations. The ImageMagick C API is complex and the data structures are currently not documented. Magick++ provides access to most of the features available from the C API but in a simple object-oriented and well-documented framework.</p>
<p>Magick++ is intended to support commercial-grade application development. In order to avoid possible conflicts with the user's application, all symbols contained in Magick++ (included by the header <tt><font color="#663366"><Magick++.h></font></tt>) are scoped to the <span lang="en-US">namespace</span> <i>Magick</i>. Symbols from the ImageMagick C library are imported under the <i>MagickCore</i> namespace to avoid possible conflicts and ImageMagick macros are only included within the Magick++ implementation so they won't impact the user's application.</p>
-<p>The core class in Magick++ is the <a href="Image++.html">Image</a> class. The Image class provides methods to manipulate a single image frame (e.g. a JPEG image). Standard Template Library (STL)<span lang="en-US">compatible</span> <a href="http://nextgen.imagemagick.org/api/STL.html">algorithms and function objects</a> are provided in order to manipulate multiple image frames or to read and write file formats which support multiple image frames (e.g. GIF animations, MPEG animations, and Postscript files).</p>
+<p>The core class in Magick++ is the <a href="
http://nextgen.imagemagick.org/api/Image++.html">Image</a> class. The Image class provides methods to manipulate a single image frame (e.g. a JPEG image). Standard Template Library (STL)<span lang="en-US">compatible</span> <a href="http://nextgen.imagemagick.org/api/STL.html">algorithms and function objects</a> are provided in order to manipulate multiple image frames or to read and write file formats which support multiple image frames (e.g. GIF animations, MPEG animations, and Postscript files).</p>
<p>The Image class supports reference-counted memory management which supports the semantics of an intrinsic variable type (e.g. 'int') with an extremely efficient <tt>operator =</tt> and copy constructor (only a pointer is assigned) while ensuring that the image data is replicated as required so that it the image may be modified without impacting earlier generations. Since the Image class manages heap memory internally, images are best allocated via C++ automatic (stack-based) memory allocation. This support allows most programs using Magick++ to be written without using any pointers, simplifying the implementation and avoiding the risks of using pointers. When a program uses automatic memory allocation to allocate Magick++ images, that aspect of the program becomes naturally exception-safe and thread-safe.</p>
<p>The image class uses a number of supportive classes in order to specify arguments. Colors are specified via the <a href="http://www.imagemagick.org/Magick++/Color.html">Color</a> class. Colors specified in X11-style string form are implicitly converted to the Color class. Geometry arguments (those specifying width, height, and/or x and y offset) are specified via the <a href="http://nextgen.imagemagick.org/api/Geometry.html">Geometry</a> class. Similar to the Color class, geometries specified as an X11-style string are implicitly converted to the Geometry class. Two dimensional drawable objects are specified via the <a href="http://nextgen.imagemagick.org/api/Drawable.html">Drawable</a> class. Drawable objects may be provided as a single object or as a list of objects to be rendered using the current image options. Montage options (a montage is a rendered grid of thumbnails in one image) are specified via the <a href="http://nextgen.imagemagick.org/api/Montage.html">Montage</a> class.</p>
<p>Errors are reported using C++ exceptions derived from the <a href="http://www.imagemagick.org/Magick++/Exception.html">Exception</a> class, which is itself derived from the standard C++ exception class. Exceptions are reported synchronous with the operation and are caught by the first matching <i>try</i> block as the stack is unraveled. This allows a clean coding style in which multiple related Magick++ commands may be executed with errors handled as a unit rather than line-by-line. Since the Image object provides reference-counted memory management, unreferenced images on the stack are automagically cleaned up, avoiding the potential for memory leaks.</p>
<tr><td><a class="reference external" href="http://www.imagemagick.org/Magick++/Geometry.html">Geometry</a></td>
<td>Geometry specification.</td>
</tr>
-<tr><td><a class="reference external" href="http://www.imagemagick.org/Magick++/Image++.html">Image</a></td>
+<tr><td><a class="reference external" href="http://www.imagemagick.org/Magick++/Image.html">Image</a></td>
<td>Image frame. This is the primary object in <em>Magick++</em>.</td>
</tr>
<tr><td><a class="reference external" href="http://www.imagemagick.org/Magick++/Montage.html">Montage</a></td>
</tr>
<tr><td><a class="reference external" href="http://www.imagemagick.org/Magick++/TypeMetric.html">TypeMetric</a></td>
<td>Container for font type metrics (use with
-<a class="reference external" href="http://www.imagemagick.org/Magick++/Image++.html#fonttypemetrics">Image::fontTypeMetrics</a>).</td>
+<a class="reference external" href="http://www.imagemagick.org/Magick++/Image.html#fonttypemetrics">Image::fontTypeMetrics</a>).</td>
</tr>
</tbody>
</table>
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<dt>wand</dt>
<dd>the magick wand. </dd>
+<dd> </dd>
+<dt>type</dt>
+<dd>type of mask, ReadPixelMask or WritePixelMask. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickGetImageBackgroundColor">MagickGetImageBackgroundColor</a></h2>
<pre class="text">
MagickBooleanType MagickGetImageBluePrimary(MagickWand *wand,double *x,
- double *y)
+ double *y,double *z)
</pre>
<p>A description of each parameter follows:</p>
<dt>y</dt>
<dd>the chromaticity blue primary y-point. </dd>
+<dd> </dd>
+<dt>z</dt>
+<dd>the chromaticity blue primary z-point. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickGetImageBorderColor">MagickGetImageBorderColor</a></h2>
<pre class="text">
MagickBooleanType MagickGetImageGreenPrimary(MagickWand *wand,double *x,
- double *y)
+ double *y,double *z)
</pre>
<p>A description of each parameter follows:</p>
<dt>y</dt>
<dd>the chromaticity green primary y-point. </dd>
+<dd> </dd>
+<dt>z</dt>
+<dd>the chromaticity green primary z-point. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickGetImageHeight">MagickGetImageHeight</a></h2>
<pre class="text">
MagickBooleanType MagickGetImageRedPrimary(MagickWand *wand,double *x,
- double *y)
+ double *y, double *z)
</pre>
<p>A description of each parameter follows:</p>
<dt>y</dt>
<dd>the chromaticity red primary y-point. </dd>
+<dd> </dd>
+<dt>z</dt>
+<dd>the chromaticity red primary z-point. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickGetImageRegion">MagickGetImageRegion</a></h2>
<pre class="text">
MagickBooleanType MagickGetImageWhitePoint(MagickWand *wand,double *x,
- double *y)
+ double *y,double *z)
</pre>
<p>A description of each parameter follows:</p>
<dt>y</dt>
<dd>the chromaticity white y-point. </dd>
+<dd> </dd>
+<dt>z</dt>
+<dd>the chromaticity white z-point. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickGetImageWidth">MagickGetImageWidth</a></h2>
<pre class="text">
MagickBooleanType MagickSetImageBluePrimary(MagickWand *wand,
- const double x,const double y)
+ const double x,const double y,const double z)
</pre>
<p>A description of each parameter follows:</p>
<dt>y</dt>
<dd>the blue primary y-point. </dd>
+<dd> </dd>
+<dt>z</dt>
+<dd>the blue primary z-point. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickSetImageBorderColor">MagickSetImageBorderColor</a></h2>
<pre class="text">
MagickBooleanType MagickSetImageGreenPrimary(MagickWand *wand,
- const double x,const double y)
+ const double x,const double y,const double z)
</pre>
<p>A description of each parameter follows:</p>
<dd>the green primary y-point. </dd>
<dd> </dd>
+<dt>z</dt>
+<dd>the green primary z-point. </dd>
<dd> </dd>
</dl>
<pre class="text">
MagickBooleanType MagickSetImageRedPrimary(MagickWand *wand,
- const double x,const double y)
+ const double x,const double y,const double z)
</pre>
<p>A description of each parameter follows:</p>
<dt>y</dt>
<dd>the red primary y-point. </dd>
+<dd> </dd>
+<dt>z</dt>
+<dd>the red primary z-point. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickSetImageRenderingIntent">MagickSetImageRenderingIntent</a></h2>
<pre class="text">
MagickBooleanType MagickSetImageWhitePoint(MagickWand *wand,
- const double x,const double y)
+ const double x,const double y,const double z)
</pre>
<p>A description of each parameter follows:</p>
<dt>y</dt>
<dd>the white y-point. </dd>
+<dd> </dd>
+<dt>z</dt>
+<dd>the white z-point. </dd>
+
<dd> </dd>
</dl>
<h2><a href="http://www.imagemagick.org/api/MagickWand/magick-image_8c.html" id="MagickShadeImage">MagickShadeImage</a></h2>
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<h2><a href="http://www.imagemagick.org/api/MagickCore/property_8c.html" id="(void)_LogMagickEvent(TraceEvent,GetMagickModule">(void) LogMagickEvent(TraceEvent,GetMagickModule</a></h2>
-<p>(void) LogMagickEvent(TraceEvent,GetMagickModule(),"s",image->filename); else if( image_info != (ImageInfo *) NULL && IfMagickTrue(image_info->debug)) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"s","no-image");</p>
+<p>(void) LogMagickEvent(TraceEvent,GetMagickModule(),"s",image->filename); else if( image_info != (ImageInfo *) NULL && image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"s","no-image");</p>
<p>if (embed_text == (const char *) NULL) return(ConstantString("")); p=embed_text;</p>
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<h2 class="magick-header"><a id="overview"></a>Architecture Overview</h2>
-<p>An image typically consists of a rectangular region of pixels and metadata. To convert, edit, or compose an image in an efficient manner we need convenient access to any pixel anywhere within the region (and sometimes outside the region). And in the case of an image sequence, we need access to any pixel of any region of any image in the sequence. However, there are hundreds of image formats such JPEG, TIFF, PNG, GIF, etc., that makes it difficult to access pixels on demand. Within these formats we find differences in:</p>
+<p>An image typically consists of a rectangular region of pixels and metadata. To convert, edit, or compose an image in an efficient manner, we need convenient access to any pixel anywhere within the region (and sometimes outside the region). And in the case of an image sequence, we need access to any pixel of any region of any image in the sequence. However, there are hundreds of image formats such JPEG, TIFF, PNG, GIF, etc., that makes it difficult to access pixels on demand. Within these formats we find differences in:</p>
<ul>
<li>colorspace (e.g sRGB, linear RGB, linear GRAY, CMYK, YUV, Lab, etc.)</li>
<h2 class="magick-header"><a id="cache"></a>The Pixel Cache</h2>
-<p>The ImageMagick pixel cache is a repository for image pixels with up to 5 channels. The first 4 channels are stored contiguously and an optional second area follows with 1 channel. The channels are at the depth specified when ImageMagick was built. The channel depths are 8 bits-per-pixel component for the Q8 version of ImageMagick, 16 bits-per-pixel component for the Q16 version, and 32 bits-per-pixel component for the Q32 version. By default pixel components are unsigned quantities, however, if you use the <a href="high-dynamic-range.html">high dynamic-range</a> version of ImageMagick, the components are 32-bit floating point. The primary 4 channels can hold any value but typically contain red, green, blue, and alpha intensities or cyan, magenta, yellow, and alpha intensities. The optional fifth channel contains the colormap indexes for colormapped images or the black channel for CMYK images. The pixel cache storage may be heap memory, anonymous memory mapped memory, disk-backed memory mapped, or on disk. The pixel cache is reference-counted. Only the cache properties are copied when the cache is cloned. The cache pixels are subsequently copied only when you signal your intention to update any of the pixels.</p>
+<p>The ImageMagick pixel cache is a repository for image pixels with up to 5 channels. The first 4 channels are stored contiguously and an optional second area follows with 1 channel. The channels are at the depth specified when ImageMagick was built. The channel depths are 8 bits-per-pixel component for the Q8 version of ImageMagick, 16 bits-per-pixel component for the Q16 version, and 32 bits-per-pixel component for the Q32 version. By default pixel components are unsigned quantities, however, if you use the <a href="high-dynamic-range.html">high dynamic-range</a> version of ImageMagick, the components are 32-bit floating point. The primary 4 channels can hold any value but typically contain red, green, blue, and alpha intensities or cyan, magenta, yellow, and alpha intensities. The optional fifth channel contains the colormap indexes for colormapped images or the black channel for CMYK images. The pixel cache storage may be heap memory, disk-backed memory mapped, or on disk. The pixel cache is reference-counted. Only the cache properties are copied when the cache is cloned. The cache pixels are subsequently copied only when you signal your intention to update any of the pixels.</p>
<h3>Create the Pixel Cache</h3>
<h3>Cache Storage and Resource Requirements</h3>
-<p>Recall that this simple and elegant design of the ImageMagick pixel cache comes at a cost in terms of storage and processing speed. The pixel cache storage requirements scales with the area of the image and the bit depth of the pixel components. For example, if we have a 640 by 480 image and we are using the Q16 version of ImageMagick, the pixel cache consumes image <var>width * height * bit-depth / 8 * channels</var> bytes or approximately 2.3 mebibytes (i.e. 640 * 480 * 2 * 4). Not too bad, but what if your image is 25000 by 25000 pixels? The pixel cache requires approximately 4.7 gibibytes of storage. Ouch. ImageMagick accounts for possible huge storage requirements by caching large images to disk rather than memory. Typically the pixel cache is stored in memory using heap memory. If heap memory is exhausted, pixels are stored in in an anonymous map; if the anonymous memory map is exhausted, we create the pixel cache on disk and attempt to memory-map it; and if memory-map memory is exhausted, we simply use standard disk I/O. Disk storage is cheap but it is also very slow, upwards of 1000 times slower than memory. We can get some speed improvements, up to 5 times, if we use memory mapping to the disk-based cache. These decisions about storage are made <var>automagically</var> by the pixel cache manager negotiating with the operating system. However, you can influence how the pixel cache manager allocates the pixel cache with <var>cache resource limits</var>. The limits include:</p>
+<p>Recall that this simple and elegant design of the ImageMagick pixel cache comes at a cost in terms of storage and processing speed. The pixel cache storage requirements scales with the area of the image and the bit depth of the pixel components. For example, if we have a 640 by 480 image and we are using the Q16 version of ImageMagick, the pixel cache consumes image <var>width * height * bit-depth / 8 * channels</var> bytes or approximately 2.3 mebibytes (i.e. 640 * 480 * 2 * 4). Not too bad, but what if your image is 25000 by 25000 pixels? The pixel cache requires approximately 4.7 gibibytes of storage. Ouch. ImageMagick accounts for possible huge storage requirements by caching large images to disk rather than memory. Typically the pixel cache is stored in memory using heap memory. If heap memory is exhausted, we create the pixel cache on disk and attempt to memory-map it. If memory-map memory is exhausted, we simply use standard disk I/O. Disk storage is cheap but it is also very slow, upwards of 1000 times slower than memory. We can get some speed improvements, up to 5 times, if we use memory mapping to the disk-based cache. These decisions about storage are made <var>automagically</var> by the pixel cache manager negotiating with the operating system. However, you can influence how the pixel cache manager allocates the pixel cache with <var>cache resource limits</var>. The limits include:</p>
<dl class="dl-horizontal">
<dt>width</dt>
<dt>area</dt>
<dd>maximum area in bytes of any one image that can reside in the pixel cache memory. If this limit is exceeded, the image is automagically cached to disk and optionally memory-mapped.</dd>
<dt>memory</dt>
- <dd>maximum amount of memory in bytes to allocate for the pixel cache from the anonymous mapped memory or the heap.</dd>
+ <dd>maximum amount of memory in bytes to allocate for the pixel cache from the heap.</dd>
<dt>map</dt>
<dd>maximum amount of memory map in bytes to allocate for the pixel cache.</dd>
<dt>disk</dt>
<h3>Distributed Pixel Cache</h3>
<p>A distributed pixel cache is an extension of the traditional pixel cache available on a single host. The distributed pixel cache may span multiple servers so that it can grow in size and transactional capacity to support very large images. Start up the pixel cache server on one or more machines. When you read or operate on an image and the local pixel cache resources are exhausted, ImageMagick contacts one or more of these remote pixel servers to store or retrieve pixels. The distributed pixel cache relies on network bandwidth to marshal pixels to and from the remote server. As such, it will likely be significantly slower than a pixel cache utilizing local storage (e.g. memory, disk, etc.).</p>
+<pre>
+convert -distribute-cache 6668 & // start on 192.168.100.50
+convert -define registry:cache:hosts=192.168.100.50:6668 myimage.jpg -sharpen 5x2 mimage.png
+</pre>
<h3>Cache Views</h3>
<p>You can request pixels outside the bounds of the image with GetVirtualPixels() or GetCacheViewVirtualPixels(), however, it is more efficient to request pixels within the confines of the image region.</p>
-<p>Although you can force the pixel cache to disk using appropriate resource limits, disk access can be upwards of 1000 times slower than memory access. For fast, efficient, access to the pixel cache, try to keep the pixel cache in heap memory or anonymous mapped memory.</p>
+<p>Although you can force the pixel cache to disk using appropriate resource limits, disk access can be upwards of 1000 times slower than memory access. For fast, efficient, access to the pixel cache, try to keep the pixel cache in heap memory.</p>
<p>The ImageMagick Q16 version of ImageMagick permits you to read and write 16 bit images without scaling but the pixel cache consumes twice as many resources as the Q8 version. If your system has constrained memory or disk resources, consider the Q8 version of ImageMagick. In addition, the Q8 version typically executes faster than the Q16 version.</p>
-<p>A great majority of image formats and algorithms restrict themselves to a fixed range of pixel values from 0 to some maximum value, for example, the Q16 version of ImageMagick permit intensities from 0 to 65535. High dynamic-range imaging (HDRI), however, permits a far greater dynamic range of exposures (i.e. a large difference between light and dark areas) than standard digital imaging techniques. HDRI accurately represents the wide range of intensity levels found in real scenes ranging from the brightest direct sunlight to the deepest darkest shadows. Enable <a href="high-dynamic-range.html">HDRI</a> at ImageMagick build time to deal with high dynamic-range images, but be mindful that each pixel component is a 32-bit floating point value. In addition, pixel values are not clamped by default so some algorithms may may have unexpected results due to out-of-band pixel values than the non-HDRI version.</p>
+<p>A great majority of image formats and algorithms restrict themselves to a fixed range of pixel values from 0 to some maximum value, for example, the Q16 version of ImageMagick permit intensities from 0 to 65535. High dynamic-range imaging (HDRI), however, permits a far greater dynamic range of exposures (i.e. a large difference between light and dark areas) than standard digital imaging techniques. HDRI accurately represents the wide range of intensity levels found in real scenes ranging from the brightest direct sunlight to the deepest darkest shadows. Enable <a href="high-dynamic-range.html">HDRI</a> at ImageMagick build time to deal with high dynamic-range images, but be mindful that each pixel component is a 32-bit floating point value. In addition, pixel values are not clamped by default so some algorithms may have unexpected results due to out-of-band pixel values than the non-HDRI version.</p>
<p>If you are dealing with large images, make sure the pixel cache is written to a disk area with plenty of free space. Under Unix, this is typically <code>/tmp</code> and for Windows, <code>c:/temp</code>. You can tell ImageMagick to write the pixel cache to an alternate location and conserve memory with these options:</p>
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- <td>ImageMagick-sparc-sun-solaris2.10.tar.gz</td>
- <td><a href="http://www.imagemagick.org/download/binaries/ImageMagick-sparc-sun-solaris2.10.tar.gz">download</a></td>
- <td><a href="ftp://ftp.imagemagick.org/pub/ImageMagick/binaries/ImageMagick-sparc-sun-solaris2.10.tar.gz">download</a></td>
- <td>Solaris Sparc 2.10</td>
+ <td>ImageMagick-i386-pc-solaris2.11.tar.gz</td>
+ <td><a href="http://www.imagemagick.org/download/binaries/ImageMagick-i386-pc-solaris2.11.tar.gz">download</a></td>
+ <td><a href="ftp://ftp.imagemagick.org/pub/ImageMagick/binaries/ImageMagick-i386-pc-solaris2.11.tar.gz">download</a></td>
+ <td>Solaris Sparc 2.11</td>
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href="command-line-options.html#stretch">‑stretch</a> • <a href="command-line-options.html#strip">‑strip</a> • <a href="command-line-options.html#stroke">‑stroke</a> • <a href="command-line-options.html#strokewidth">‑strokewidth</a> • <a href="command-line-options.html#style">‑style</a> • <a href="command-line-options.html#subimage-search">‑subimage‑search</a> • <a href="command-line-options.html#swap">‑swap</a> • <a href="command-line-options.html#swirl">‑swirl</a> • <a href="command-line-options.html#synchronize">‑synchronize</a> • <a href="command-line-options.html#taint">‑taint</a> • <a href="command-line-options.html#text-font">‑text‑font</a> • <a href="command-line-options.html#texture">‑texture</a> • <a href="command-line-options.html#threshold">‑threshold</a> • <a href="command-line-options.html#thumbnail">‑thumbnail</a> • <a href="command-line-options.html#tile">‑tile</a> • <a href="command-line-options.html#tile-offset">‑tile‑offset</a> • <a 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href="command-line-options.html#version">‑version</a> • <a href="command-line-options.html#view">‑view</a> • <a href="command-line-options.html#vignette">‑vignette</a> • <a href="command-line-options.html#virtual-pixel">‑virtual‑pixel</a> • <a href="command-line-options.html#visual">‑visual</a> • <a href="command-line-options.html#watermark">‑watermark</a> • <a href="command-line-options.html#wave">‑wave</a> • <a href="command-line-options.html#w
avelet-denoise">‑wavelet‑denoise</a> • <a href="command-line-options.html#weight">‑weight</a> • <a href="command-line-options.html#white-point">‑white‑point</a> • <a href="command-line-options.html#white-threshold">‑white‑threshold</a> • <a href="command-line-options.html#window">‑window</a> • <a href="command-line-options.html#window-group">‑window‑group</a> • <a href="command-line-options.html#write">‑write</a> </p>
<p class="lead magick-description">Below is list of command-line options recognized by the ImageMagick <a href="command-line-tools.html">command-line tools</a>. If you want a description of a particular option, click on the option name in the navigation bar above and you will go right to it. Unless otherwise noted, each option is recognized by the commands: <a href="convert.html">convert</a> and <a href="mogrify.html">mogrify</a>.</p>
to run the benchmark in parallel (requires the OpenMP feature).</p>
<pre>
--> convert logo: -resize 1000% -bench 5 logo.png
+-> convert logo: -resize 200% -bench 5 logo.png
+Performance[1]: 5i 1.344ips 1.000e 3.710u 0:03.720
+Performance[2]: 5i 1.634ips 0.549e 3.890u 0:03.060
+Performance[3]: 5i 2.174ips 0.618e 3.190u 0:02.300
+Performance[4]: 5i 1.678ips 0.555e 3.810u 0:02.980
Performance[4]: 5i 0.875657ips 6.880u 0:05.710
</pre>
-<p>In this example, 5 iterations were completed at 0.875657 iterations per
-second, using 4 threads and 6.88 seconds of the user's allotted time, for
-a total elapsed time of 5.71 seconds.</p>
+<p>In this example, 5 iterations were completed at 2.174 iterations per
+second, using 3 threads and 3.190 seconds of the user allotted time, for
+a total elapsed time of 2.300 seconds.</p>
<div style="margin: auto;">
<h3 class="magick-header"><a id="bias"></a>-bias <var>value</var>{<var>%</var>}</h3>
<td>Sets the tile size for pyramid tiffs. Requires the suffix
PTIF: before the outputname</td>
</tr>
+
+ <tr>
+ <td>type:features=<var>string</var></td>
+ <td> </td>
+ </tr>
+
+ <tr>
+ <td>type:hinting=<var>off</var></td>
+ <td> </td>
+ </tr>
</table>
<p>For example, to create a postscript file that will render only the black
<p class="magick-description">Set the pixel cache resource limit.</p>
-<p>Choose from: <code>area</code>, <code>disk</code>, <code>file</code>,
-<code>map</code>, <code>memory</code>, <code>thread</code>, or <code>time</code>.</p>
+<p>Choose from: <code>width</code>, <code>height</code>, <code>area</code>, <code>memory</code>, <code>map</code>, <code>disk</code>, <code>file</code>, <code>thread</code>, <code>throttle</code>, or <code>time</code>.</p>
<p>The value for <code>file</code> is in number of files. The other limits are
in bytes. Define arguments for the memory, map, area, and disk resource limits
<p class="magick-description">Shear the columns of an image into a sine wave.</p>
-<p>Specify <var>amplitude</var> and <var>wavelength</var>
-of the wave.</p>
+<div style="margin: auto;">
+ <h3 class="magick-header"><a id="wavelet-denoise"></a>-wavelet-denoise <var>threshold</var><br />-wavelet-denoise <var>threshold</var>x<var>softness</var></h3>
+</div>
+
+<p class="magick-description">removes noise from the image using a wavelet transform. The threshold is the value below which everything is considered noise and ranges from 0.0 (none) to QuantumRange or use percent (e.g. 5%). Softness attenuates the threshold and typically ranges from 0.0 (none) to 1.0. The higher the value the more noise that remains in the image.</p>
<div style="margin: auto;">
<h3 class="magick-header"><a id="weight"></a>-weight <var>fontWeight</var></h3>
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+ <a class="magick-nav-item pull-right" href="https://www.imagemagick.org/discourse-server/">Community</a>
</nav>
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</div>
<p>Finally, use <code>@</code> to specify the maximum area in pixels of an image, again while attempting to preserve aspect ratio. (Pixels take only integer values, so some approximation is always at work.) In the following example, an area of 10000 pixels is requested. The resulting file has dimensions 115x86, which has 9890 pixels. </p>
<pre>
-convert logo: -resize '@10000' wiz10000.png
+convert logo: -resize '10000@' wiz10000.png
</pre>
<p class="bg-info">In all the examples above and below, we have enclosed the <var>geometry</var> arguments within quotation marks. Doing so is optional in many cases, but not always. We <var>must</var> enclose the geometry specifications in quotation marks when using <code><</code> or <code>></code> to prevent these characters from being interpreted by the shell as <var>file redirection</var>. On Windows systems, the carat <code>^</code> needs to be within quotes, else it is ignored. To be safe, one should probably maintain a habit of enclosing all <var>geometry</var> arguments in quotes, as we have here.
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</nav>
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- <p class="lead magick-description">Post here for any of the issues listed below. You can expect a response
if your issue is a sponsorship, <a href="http://www.imagemagick.org/www/license.html">license</a>, security, or paid support issue. To get a response for any other issue, post to the ImageMagick public <a href="http://www.imagemagick.org/discourse-server">forums</a>. For bug reports, post to the <a href="https://github.com/ImageMagick/ImageMagick/issues">issues</a> forum. Note, we do not offer sponsored links <u>nor do we respond to solicitations</u>.</p>
+ <p class="lead magick-description">Post here for any of the issues listed below. You can expect a response
from our team if your issue is a sponsorship, <a href="http://www.imagemagick.org/www/license.html">license</a>, security, or paid support issue. If you require a response for any other issue, post to the ImageMagick public <a href="http://www.imagemagick.org/discourse-server">forums</a>. For bug reports, post to the <a href="https://github.com/ImageMagick/ImageMagick/issues">issues</a> forum. Note, we do not offer sponsored links <u>nor do we respond to solicitations</u>.</p>
<fieldset>
<h2 class="magick-header">Contact the Wizards</h2>
<p>Enter this code, <code>
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<td>alter an image along a sine wave</td>
</tr>
+ <tr>
+ <td><a href="command-line-options.html#wavelet">-wavelet-denoise <var>threshold</var></a></td>
+ <td>removes noise from the image using a wavelet transform</td>
+ </tr>
+
<tr>
<td><a href="command-line-options.html#weight">-weight <var>type</var></a></td>
<td>render text with this font weight</td>
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<td>PDF</td>
<td>RW</td>
<td>Portable Document Format</td>
- <td>Requires <a href="http://www.cs.wisc.edu/%7Eghost">Ghostscript</a> to read. By default, ImageMagick sets the page size to the MediaBox. Some PDF files, however, have a CropBox or TrimBox that is smaller than the MediaBox and may include white space, registration or cutting marks outside the CropBox or TrimBox. To force ImageMagick to use the CropBox or TrimBox rather than the MediaBox, use <a href="command-line-options.html#define">-define</a> (e.g. <code>-define pdf:use-cropbox=true</code> or <code>-define pdf:use-trimbox=true</code>). Use <a href="command-line-options.html#density">-density</a> to improve the appearance of your PDF rendering (e.g. -density 300x300). Use <a href="command-line-options.html#alpha">-alpha remove </a> to remove transparency. To specify direct conversion from Postscript to PDF, use <code>-define delegate:bimodel=true</code>. Use <code>-define pdf:fit-page=true</code> to scale to the page size. To immediately stop processing upon an error, set <code>-define pdf:stop-on-error</code> to <code>true</code>.</td>
+ <td>Requires <a href="http://www.cs.wisc.edu/%7Eghost">Ghostscript</a> to read. By default, ImageMagick sets the page size to the MediaBox. Some PDF files, however, have a CropBox or TrimBox that is smaller than the MediaBox and may include white space, registration or cutting marks outside the CropBox or TrimBox. To force ImageMagick to use the CropBox or TrimBox rather than the MediaBox, use <a href="command-line-options.html#define">-define</a> (e.g. <code>-define pdf:use-cropbox=true</code> or <code>-define pdf:use-trimbox=true</code>). Use <a href="command-line-options.html#density">-density</a> to improve the appearance of your PDF rendering (e.g. -density 300x300). Use <a href="command-line-options.html#alpha">-alpha remove </a> to remove transparency. To specify direct conversion from Postscript to PDF, use <code>-define delegate:bimodel=true</code>. Use <code>-define pdf:fit-page=true</code> to scale to the page size. To immediately stop processing upon an error, set <code>-define pdf:stop-on-error</code> to <code>true</code>. To set the page direction preferences to right-to-left, try <code>-define pdf:page-direction=right-to-left</code>.</td>
</tr>
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-<p class="text-center"><a href="index.html#features">Features and Capabilities</a> • <a href="index.html#news">News</a> • <a href="index.html#community">Community</a></p>
+<p class="text-center"><a href="http://nextgen.imagemagick.org/www/index.html#features">Features and Capabilities</a> • <a href="http://nextgen.imagemagick.org/www/index.html#news">News</a> • <a href="http://nextgen.imagemagick.org/www/index.html#community">Community</a></p>
<p class="lead magick-description"><a href="../images/wizard.png" title="And Now a Touch of Magick"><img class="img-responsive magick-icon" id="logo" alt="And Now a Touch of Magick" width="265" height="352" src="../images/wizard.jpg" /></a>
ImageMagick<sup><a href="http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78333969">®</a></sup> is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of <a href="formats.html">formats</a> (over 200) including PNG, JPEG, JPEG-2000, GIF, TIFF, <a href="motion-picture.html">DPX</a>, <a href="high-dynamic-range.html">EXR</a>, WebP, Postscript, PDF, and SVG. Use ImageMagick to resize, flip, mirror, rotate, distort, shear and transform images, adjust image colors, apply various special effects, or draw text, lines, polygons, ellipses and Bézier curves.</p>
<h2 class="magick-header"><a id="news"></a>News</h2>
-<p>The design of ImageMagick is an evolutionary process, with the design and implementation efforts serving to influence and guide further progress in the other. With <a href="
../index.html">ImageMagick version 7</a>, we aim to improve the design based on lessons learned from the version 6 implementation. See the <a href="porting.html">porting</a> guide to track the progress of the version 7 development effort.</p>
+<p>The design of ImageMagick is an evolutionary process, with the design and implementation efforts serving to influence and guide further progress in the other. With <a href="
http://nextgen.imagemagick.org/index.html">ImageMagick version 7</a>, we aim to improve the design based on lessons learned from the version 6 implementation. See the <a href="porting.html">porting</a> guide to track the progress of the version 7 development effort.</p>
<h2 class="magick-header"><a id="community"></a>Community</h2>
<p>To join the ImageMagick community, try the <a href="http://www.imagemagick.org/discourse-server/">discourse server</a>. You can review questions or comments (with informed responses) posed by ImageMagick users or ask your own questions. If you want to contribute image processing algorithms, other enhancements, or bug fixes, open an <a href="http://git.imagemagick.org/repos/ImageMagick/issues">issue</a>. </p>
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<td>alter an image along a sine wave</td>
</tr>
+ <tr>
+ <td><a href="command-line-options.html#wavelet">-wavelet-denoise <var>threshold</var></a></td>
+ <td>removes noise from the image using a wavelet transform</td>
+ </tr>
+
<tr>
<td><a href="command-line-options.html#weight">-weight <var>type</var></a></td>
<td>render text with this font weight</td>
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<tr>
<td>BlackThreshold</td>
- <td>threshold=><i>string</i>, , channel=>{All, Default, Alpha, Black, Blue, CMYK, Cyan, Gray, Green, Index, Magenta, Opacity, Red, RGB, Yellow}</td>
+ <td>threshold=><i>string</i>, channel=>{All, Default, Alpha, Black, Blue, CMYK, Cyan, Gray, Green, Index, Magenta, Opacity, Red, RGB, Yellow}</td>
<td>force all pixels below the threshold intensity into black</td>
</tr>
<td>alter an image along a sine wave</td>
</tr>
+ <tr>
+ <td>WaveDenoise</td>
+ <td>geometry=><i>geometry</i>, threshold=><i>double</i>, threshold=><i>double</i></td>
+ <td>removes noise from the image using a wavelet transform</td>
+ </tr>
+
<tr>
<td>WhiteThreshold</td>
<td>threshold=><i>string</i>, , channel=>{All, Default, Alpha, Black, Blue, CMYK, Cyan, Gray, Green, Index, Magenta, Opacity, Red, RGB, Yellow}</td>
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</div>
<p>Changes from ImageMagick version 6 to version 7 are summarized here:</p>
<h4>High Dynamic Range Imaging</h4>
<ul>
-<li>ImageMagick version 7 enables HDRI by default. Expect more accurate image processing results with higher memory requirement and possible slower processing times.</li>
+<li>ImageMagick version 7 enables HDRI by default. Expect more accurate image processing results with higher memory requirements and possible slower processing times. You can disable this feature for resource constrained system such as a cell phone with a slight loss of accuracy for certain algorithms (e.g. resizing).</li>
</ul>
<h4>Pixels</h4>
<ul>
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projects / imagemagick / commitdiff