mirror of
https://github.com/sigmasternchen/php-doc-en
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18dc6d0d46
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@336315 c90b9560-bf6c-de11-be94-00142212c4b1
154 lines
3.6 KiB
XML
154 lines
3.6 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="imagickkernel.addunitykernel" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>ImagickKernel::addUnityKernel</refname>
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<refpurpose>Description</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<modifier>public</modifier> <type>void</type><methodname>ImagickKernel::addUnityKernel</methodname>
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<void />
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</methodsynopsis>
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<para>
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Adds a given amount of the 'Unity' Convolution Kernel to the given pre-scaled
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and normalized Kernel. This in effect adds that amount of the original image
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into the resulting convolution kernel. The resulting effect is to convert the
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defined kernels into blended soft-blurs, unsharp kernels or into sharpening kernels.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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&no.function.parameters;
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title> <function>ImagickKernel::addUnityKernel</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function renderKernelTable($matrix) {
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$output = "<table class='infoTable'>";
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foreach ($matrix as $row) {
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$output .= "<tr>";
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foreach ($row as $cell) {
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$output .= "<td style='text-align:left'>";
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if ($cell === false) {
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$output .= "false";
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}
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else {
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$output .= round($cell, 3);
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}
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$output .= "</td>";
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}
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$output .= "</tr>";
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}
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$output .= "</table>";
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return $output;
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}
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$matrix = [
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[-1, 0, -1],
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[ 0, 4, 0],
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[-1, 0, -1],
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];
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$kernel = \ImagickKernel::fromMatrix($matrix);
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$kernel->scale(1, \Imagick::NORMALIZE_KERNEL_VALUE);
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$output = "Before adding unity kernel: <br/>";
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$output .= renderKernelTable($kernel->getMatrix());
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$kernel->addUnityKernel(0.5);
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$output .= "After adding unity kernel: <br/>";
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$output .= renderKernelTable($kernel->getMatrix());
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$kernel->scale(1, \Imagick::NORMALIZE_KERNEL_VALUE);
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$output .= "After renormalizing kernel: <br/>";
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$output .= renderKernelTable($kernel->getMatrix());
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echo $output;
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?>
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]]>
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</programlisting>
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</example>
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<example>
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<title> <function>ImagickKernel::addUnityKernel</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function addUnityKernel($imagePath) {
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$matrix = [
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[-1, 0, -1],
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[ 0, 4, 0],
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[-1, 0, -1],
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];
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$kernel = ImagickKernel::fromMatrix($matrix);
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$kernel->scale(4, \Imagick::NORMALIZE_KERNEL_VALUE);
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$kernel->addUnityKernel(0.5);
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$imagick = new \Imagick(realpath($imagePath));
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$imagick->filter($kernel);
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header("Content-Type: image/jpg");
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echo $imagick->getImageBlob();
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}
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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