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PHP Manual :: Imagick::filter



Imagick::extentImage || Imagick::flattenImages || Imagick || PHP Manual

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Imagick::filterDescription

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 = [
        [-
10, -1],
        [
0,  5,  0],
        [-
10, -1],
    ];
    
    
$kernel = \ImagickKernel::fromMatrix($matrix);
    
$strength 0.5;    
    
$kernel->scale($strength, \Imagick::NORMALIZE_KERNEL_VALUE);    
    
$kernel->addUnityKernel($strength);

    
$imagick->filter($kernel);
    
header("Content-Type: image/jpg");
    echo 
$imagick->getImageBlob();
}

?>



Imagick::extentImage || Imagick::flattenImages || Imagick || PHP Manual
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