Imagick::filter

(PECL imagick 3 >= 3.3.0)

Imagick::filterApplies a custom convolution kernel to the image

警告

此函数在 Imagick 3.4.4 中被 废弃,强烈建议不要应用此函数。

说明

public Imagick::filter(ImagickKernel $ImagickKernel, int $channel = Imagick::CHANNEL_UNDEFINED): bool

Applies a custom convolution kernel to the image.

参数

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. 缺省为Imagick::CHANNEL_DEFAULT. 参考此 通道常数列表

返回值

成功时返回 true

范例

示例 #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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User Contributed Notes 2 notes

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0
wangzh at dingl dot me
5 years ago
-----Imagick  3.4.3  &&  ImageMagick 7.0.6 

-----why cannot find filter method?????

if (!method_exists(Imagick, 'filter')) {
    echo 'undefined filter()!';
} else {
    echo 'defined filter()!';
}
up
0
wangzh at dingl dot me
5 years ago
-----Imagick::filter cannot work!

-----suse linux server   ,   imagick module version 3.4.3

-----run Example #1 Imagick::filter()  , there is no result!  where is problem?

thank you for your answer!

Alex
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