array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'imagick.setimagebias.php', 1 => 'Imagick::setImageBias', 2 => 'Sets the image bias for any method that convolves an image', ), 'up' => array ( 0 => 'class.imagick.php', 1 => 'Imagick', ), 'prev' => array ( 0 => 'imagick.setimagebackgroundcolor.php', 1 => 'Imagick::setImageBackgroundColor', ), 'next' => array ( 0 => 'imagick.setimagebiasquantum.php', 1 => 'Imagick::setImageBiasQuantum', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/imagick/imagick/setimagebias.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

Imagick::setImageBias

(PECL imagick 2, PECL imagick 3)

Imagick::setImageBias — Sets 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();
}

?>