mirror of
https://github.com/php/doc-en.git
synced 2026-03-24 07:42:10 +01:00
155 lines
3.7 KiB
XML
155 lines
3.7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
|
<!-- $Revision$ -->
|
|
|
|
<refentry xml:id="imagickkernel.addunitykernel" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
|
|
<refnamediv>
|
|
<refname>ImagickKernel::addUnityKernel</refname>
|
|
<refpurpose>Adds a Unity Kernel to the kernel list</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsect1 role="description">
|
|
&reftitle.description;
|
|
<methodsynopsis>
|
|
<modifier>public</modifier> <type>void</type><methodname>ImagickKernel::addUnityKernel</methodname>
|
|
<methodparam><type>float</type><parameter>scale</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
Adds a given amount of the 'Unity' Convolution Kernel to the given pre-scaled
|
|
and normalized Kernel. This in effect adds that amount of the original image
|
|
into the resulting convolution kernel. The resulting effect is to convert the
|
|
defined kernels into blended soft-blurs, unsharp kernels or into sharpening kernels.
|
|
</para>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1 role="parameters">
|
|
&reftitle.parameters;
|
|
&no.function.parameters;
|
|
</refsect1>
|
|
|
|
<refsect1 role="returnvalues">
|
|
&reftitle.returnvalues;
|
|
<para>
|
|
|
|
</para>
|
|
</refsect1>
|
|
|
|
|
|
|
|
|
|
<refsect1 role="examples">
|
|
&reftitle.examples;
|
|
<para>
|
|
<example>
|
|
<title> <function>ImagickKernel::addUnityKernel</function></title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
|
|
|
|
|
|
function renderKernelTable($matrix) {
|
|
$output = "<table class='infoTable'>";
|
|
|
|
foreach ($matrix as $row) {
|
|
$output .= "<tr>";
|
|
foreach ($row as $cell) {
|
|
$output .= "<td style='text-align:left'>";
|
|
if ($cell === false) {
|
|
$output .= "false";
|
|
}
|
|
else {
|
|
$output .= round($cell, 3);
|
|
}
|
|
$output .= "</td>";
|
|
}
|
|
$output .= "</tr>";
|
|
}
|
|
|
|
$output .= "</table>";
|
|
|
|
return $output;
|
|
}
|
|
|
|
$matrix = [
|
|
[-1, 0, -1],
|
|
[ 0, 4, 0],
|
|
[-1, 0, -1],
|
|
];
|
|
|
|
$kernel = \ImagickKernel::fromMatrix($matrix);
|
|
$kernel->scale(1, \Imagick::NORMALIZE_KERNEL_VALUE);
|
|
$output = "Before adding unity kernel: <br/>";
|
|
$output .= renderKernelTable($kernel->getMatrix());
|
|
$kernel->addUnityKernel(0.5);
|
|
$output .= "After adding unity kernel: <br/>";
|
|
$output .= renderKernelTable($kernel->getMatrix());
|
|
|
|
|
|
$kernel->scale(1, \Imagick::NORMALIZE_KERNEL_VALUE);
|
|
$output .= "After renormalizing kernel: <br/>";
|
|
$output .= renderKernelTable($kernel->getMatrix());
|
|
|
|
echo $output;
|
|
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
|
|
<example>
|
|
<title> <function>ImagickKernel::addUnityKernel</function></title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
function addUnityKernel($imagePath) {
|
|
|
|
$matrix = [
|
|
[-1, 0, -1],
|
|
[ 0, 4, 0],
|
|
[-1, 0, -1],
|
|
];
|
|
|
|
$kernel = ImagickKernel::fromMatrix($matrix);
|
|
|
|
$kernel->scale(4, \Imagick::NORMALIZE_KERNEL_VALUE);
|
|
$kernel->addUnityKernel(0.5);
|
|
|
|
|
|
$imagick = new \Imagick(realpath($imagePath));
|
|
$imagick->filter($kernel);
|
|
header("Content-Type: image/jpg");
|
|
echo $imagick->getImageBlob();
|
|
|
|
}
|
|
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
</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
|
|
-->
|