PHP 8.4.0 RC2 available for testing

ImagickKernel::addUnityKernel

(PECL imagick >= 3.3.0)

ImagickKernel::addUnityKernelAdds a Unity Kernel to the kernel list

Açıklama

public ImagickKernel::addUnityKernel(float $scale): void

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.

Bağımsız Değişkenler

Bu işlevin bağımsız değişkeni yoktur.

Dönen Değerler

Örnekler

Örnek 1 ImagickKernel::addUnityKernel()

<?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;

?>

Örnek 2 ImagickKernel::addUnityKernel()

<?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();

}

?>

add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top