Imagick::thresholdImage
(PECL imagick 2, PECL imagick 3)
Imagick::thresholdImage — Changes the value of individual pixels based on a threshold
Description
public Imagick::thresholdImage(float
$threshold, int $channel = Imagick::CHANNEL_DEFAULT): boolChanges the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image.
Parameters
-
threshold -
-
channel -
Return Values
Returns true on success.
Examples
Example #1 Imagick::thresholdImage()
<?php
function thresholdimage($imagePath, $threshold, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->thresholdimage($threshold * \Imagick::getQuantum(), $channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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