Imagick::thresholdImage
PHP function
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(PECL imagick 2, PECL imagick 3)
Changes the value of individual pixels based on a threshold
Description
Imagick::thresholdImage(float $threshold, int $channel = Imagick::CHANNEL_DEFAULT): bool
Changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image.
Parameters
thresholdchannel
Return Values
Success
Examples
php
<?php
function thresholdimage($imagePath, $threshold, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->thresholdimage($threshold * \Imagick::getQuantum(), $channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>