Imagick::setImageBias
(PECL imagick 2, PECL imagick 3)
Imagick::setImageBias — Sets the image bias for any method that convolves an image
Warning
This function has been DEPRECATED as of Imagick 3.4.4. Relying on this function is highly discouraged.
Description
public Imagick::setImageBias(float
$bias): boolSets the image bias for any method that convolves an image (e.g. Imagick::ConvolveImage()).
Parameters
-
bias -
Return Values
Returns true on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 Imagick::setImageBias()
<?php
//requires ImageMagick version 6.9.0-1 to have an effect on convolveImage
function setImageBias($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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