<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="gmagick.gammaimage" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>Gmagick::gammaimage</refname>
  <refpurpose>Gamma-corrects an image</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier>public</modifier> <type>Gmagick</type><methodname>Gmagick::gammaimage</methodname>
   <methodparam><type>float</type><parameter>gamma</parameter></methodparam>
  </methodsynopsis>
  <para>
   Gamma-corrects an image. The same image viewed on different devices will have perceptual differences in the way the image's intensities are represented on the screen. Specify individual gamma levels for the red, green, and blue channels, or adjust all three with the gamma parameter. Values typically range from 0.8 to 2.3. 
  </para>

 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>gamma</parameter></term>
     <listitem>
      <para>
       The amount of gamma-correction.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
  The gamma corrected <classname>Gmagick</classname> object.
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  <para>
   &gmagick.gmagickexception.throw;
  </para>
 </refsect1>

</refentry>

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