Imagick::convolveImage

(PECL imagick 2.0.0)

Imagick::convolveImageApplies a custom convolution kernel to the image

Beschreibung

bool Imagick::convolveImage ( array $kernel [, int $channel = Imagick::CHANNEL_ALL ] )

Applies a custom convolution kernel to the image.

Parameter-Liste

kernel

The convolution kernel

channel

Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.

R├╝ckgabewerte

Liefert TRUE bei Erfolg.

Fehler/Exceptions

Wirft ImagickException bei Fehlern.

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User Contributed Notes 1 note

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peter at musicalsaw dot com
6 months ago
Example of convolveImage:

<?php
// run an edge detection filter on an image
$image = new imagick( "diana.png" );
$edgeArray = array(-1,-1,-1,-1,8,-1,-1,-1,-1);
$image->convolveImage ($edgeArray);
$image->thresholdImage(1);
header('Content-type: image/png');
echo
$image;
?>
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