(PECL imagick 2, PECL imagick 3)
Imagick::setImageBias — Sets the image bias for any method that convolves an image
This function has been DEPRECATED as of Imagick 3.4.4. Relying on this function is highly discouraged.
Sets the image bias for any method that convolves an image (e.g. Imagick::ConvolveImage()).
bias
Returns true on success.
Throws ImagickException on error.
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();
}
?>