(PECL imagick 2, PECL imagick 3)

Imagick::randomThresholdImageCreates a high-contrast, two-color image


public Imagick::randomThresholdImage(float $low, float $high, 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. Questo metodo è disponibile se Imagick è stato compilato con ImageMagick versione 6.2.9 o successive.

Elenco dei parametri


The low point


The high point


Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.

Valori restituiti

Restituisce true in caso di successo.


Example #1 Imagick::randomThresholdImage()

function randomThresholdimage($imagePath$lowThreshold$highThreshold$channel) {
$imagick = new \Imagick(realpath($imagePath));

$lowThreshold * \Imagick::getQuantum(),
$highThreshold * \Imagick::getQuantum(),
header("Content-Type: image/jpg");


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