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<div class="document" id="cdl">
<h1 class="title">cdl</h1>
<h2 class="subtitle" id="apply-asc-cdl-transform-to-image">Apply ASC CDL transform to image</h2>
<div class="contents topic" id="contents">
<p class="topic-title">Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#cdlimage" id="id1">CdlImage</a></li>
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<div class="section" id="cdlimage">
<h1><a class="toc-backref" href="#id1">CdlImage</a></h1>
<div class="section" id="synopsis">
<h2>Synopsis</h2>
<pre class="literal-block">
MagickPassFail CdlImage( <a class="reference external" href="../api/types.html#image">Image</a> *image, const char *cdl );
</pre>
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<div class="section" id="description">
<h2>Description</h2>
<p>The CdlImage() method applies ("bakes in") the ASC-CDL which is a format
for the exchange of basic primary color grading information between
equipment and software from different manufacturers. The format defines
the math for three functions: slope, offset and power. Each function uses
a number for the red, green, and blue color channels for a total of nine
numbers comprising a single color decision. A tenth number for chrominance
(saturation) has been proposed but is not yet standardized.</p>
<p>The cdl argument string is comma delimited and is in the form (but
without invervening spaces or line breaks):</p>
<p>redslope, redoffset, redpower :
greenslope, greenoffset, greenpower :
blueslope, blueoffset, bluepower :
saturation</p>
<p>with the unity (no change) specification being:</p>
<p>"1.0,0.0,1.0:1.0,0.0,1.0:1.0,0.0,1.0:0.0"</p>
<p>See <a class="reference external" href="http://en.wikipedia.org/wiki/ASC_CDL">http://en.wikipedia.org/wiki/ASC_CDL</a> for more information.</p>
<p>The format of the CdlImage method is:</p>
<pre class="literal-block">
MagickPassFail CdlImage( <a class="reference external" href="../api/types.html#image">Image</a> *image, const char *cdl );
</pre>
<p>A description of each parameter follows:</p>
<dl class="docutils">
<dt>image:</dt>
<dd>The image.</dd>
<dt>cdl:</dt>
<dd>Define the coefficients for slope offset and power in the
red green and blue channels, plus saturation.</dd>
</dl>
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