Imagick::filter
Imagick::filter
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Imagick::filter — Description
Description
public void Imagick::filter ( ImagickKernel $ImagickKernel [, int $CHANNEL = Imagick::CHANNEL_DEFAULT ] )
Applies a custom convolution kernel to the image.
Parameters
-
ImagickKernel -
An instance of ImagickKernel that represents either a single kernel or a linked series of kernels.
-
CHANNEL -
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. Defaults to
Imagick::CHANNEL_DEFAULT. Refer to this list of channel constants
Return Values
Examples
Example #1 Imagick::filter()
<?php
function filter($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
$matrix = [
[-1, 0, -1],
[0, 5, 0],
[-1, 0, -1],
];
$kernel = \ImagickKernel::fromMatrix($matrix);
$strength = 0.5;
$kernel->scale($strength, \Imagick::NORMALIZE_KERNEL_VALUE);
$kernel->addUnityKernel(1 - $strength);
$imagick->filter($kernel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/imagick.filter.php
