doc-fr/reference/image/functions/imageconvolution.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 213fbd9440a224f9c1da4942c85124ce0c120c52 Maintainer: yannick Status: ready -->
<!-- Reviewed: yes -->
<refentry xml:id="function.imageconvolution" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>imageconvolution</refname>
  <refpurpose>Applique une matrice de la convolution 3x3, en utilisant le coefficient et l'excentrage</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>bool</type><methodname>imageconvolution</methodname>
   <methodparam><type>GdImage</type><parameter>image</parameter></methodparam>
   <methodparam><type>array</type><parameter>matrix</parameter></methodparam>
   <methodparam><type>float</type><parameter>divisor</parameter></methodparam>
   <methodparam><type>float</type><parameter>offset</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>imageconvolution</function> applique une matrice de la convolution
   3x3, en utilisant le coefficient <parameter>div</parameter> et l'excentrage
   <parameter>offset</parameter>.
  </para>
 </refsect1>
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    &gd.image.description;
    <varlistentry>
     <term><parameter>matrix</parameter></term>
     <listitem>
      <para>
       Une matrice 3x3 : un tableau contenant trois tableaux de trois
       nombres à virgules flottantes.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>divisor</parameter></term>
     <listitem>
      <para>
       Le diviseur du résultat de la convolution, utilisé pour la normalisation.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>offset</parameter></term>
     <listitem>
      <para>
       La position de la couleur.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.success;
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     &gd.changelog.image-param;
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Impression du logo PHP.net avec <function>imageconvolution</function></title>
    <programlisting role="php">
<![CDATA[
<?php
$image = imagecreatefromgif('http://www.php.net/images/php.gif');

$emboss = array(array(2, 0, 0), array(0, -1, 0), array(0, 0, -1));
imageconvolution($image, $emboss, 1, 127);

header('Content-Type: image/png');
imagepng($image, null, 9);
?>
]]>
    </programlisting>
    &example.outputs;
    <mediaobject>
     <imageobject>
      <imagedata fileref="en/reference/image/figures/imageconvolution_emboss.png"/>
     </imageobject>
    </mediaobject>
   </example>
   <example>
    <title>Flou gaussien avec <function>imageconvolution</function></title>
    <programlisting role="php">
<![CDATA[
<?php
$image = imagecreatetruecolor(180,40);

// Écrit le texte et applique un floue gaussien sur l'image
imagestring($image, 5, 10, 8, 'Texte floue goussien', 0x00ff00);
$gaussian = array(array(1.0, 2.0, 1.0), array(2.0, 4.0, 2.0), array(1.0, 2.0, 1.0));
imageconvolution($image, $gaussian, 16, 0);

// Récrit le texte pour la comparaison
imagestring($image, 5, 10, 18, 'Texte floue goussien', 0x00ff00);

header('Content-Type: image/png');
imagepng($image, null, 9);
?>
]]>
    </programlisting>
    &example.outputs;
    <mediaobject>
     <alt>Affichage de l'exemple : Floue gaussien</alt>
     <imageobject>
      <imagedata fileref="en/reference/image/figures/imageconvolution_gaussian.png"/>
     </imageobject>
    </mediaobject>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <simplelist>
   <member><function>imagefilter</function></member>
  </simplelist>
 </refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->