Imagick::convolveImage

(PECL imagick 2.0.0)

Imagick::convolveImageApplies a custom convolution kernel to the image

Descrizione

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

Applies a custom convolution kernel to the image.

Elenco dei parametri

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.

Valori restituiti

Restituisce TRUE in caso di successo.

Errori/Eccezioni

Lancia una ImagickException in caso di errore.

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User Contributed Notes 1 note

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peter at musicalsaw dot com
1 year 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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