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Imagick::setImageBias

(PECL imagick 2, PECL imagick 3)

Imagick::setImageBiasSets the image bias for any method that convolves an 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::setImageBias(float $bias): bool

Sets the image bias for any method that convolves an image (e.g. Imagick::ConvolveImage()).

参数

bias

返回值

成功时返回 true

错误/异常

错误时抛出 ImagickException。

示例

示例 #1 Imagick::setImageBias()

<?php
//requires ImageMagick version 6.9.0-1 to have an effect on convolveImage
function setImageBias($bias) {
$imagick = new \Imagick(realpath("images/stack.jpg"));

$xKernel = array(
-
0.70, 0, 0.70,
-
0.70, 0, 0.70,
-
0.70, 0, 0.70
);

$imagick->setImageBias($bias * \Imagick::getQuantum());
$imagick->convolveImage($xKernel, \Imagick::CHANNEL_ALL);

$imagick->setImageFormat('png');

header('Content-type: image/png');
echo
$imagick->getImageBlob();
}

?>

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