Imagick::convolveImage
(PECL imagick 2, PECL imagick 3)
Imagick::convolveImage — Applies a custom convolution kernel to the image
Description
public Imagick::convolveImage(array
$kernel, int $channel = Imagick::CHANNEL_DEFAULT): boolApplies a custom convolution kernel to the image.
Parameters
-
kernel -
The convolution kernel
-
channel -
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
Return Values
Returns true on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 Imagick::convolveImage()
<?php
function convolveImage($imagePath, $bias, $kernelMatrix) {
$imagick = new \Imagick(realpath($imagePath));
//$edgeFindingKernel = [-1, -1, -1, -1, 8, -1, -1, -1, -1,];
$imagick->setImageBias($bias * \Imagick::getQuantum());
$imagick->convolveImage($kernelMatrix);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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