Imagick::randomThresholdImage

(PECL imagick 2, PECL imagick 3)

Imagick::randomThresholdImage — Creates a high-contrast, two-color image

Descrizione

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

low: The low point
high: The high point
channel: 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.

Esempi

Example #1 Imagick::randomThresholdImage()

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

    $imagick->randomThresholdimage(
        $lowThreshold * \Imagick::getQuantum(),
        $highThreshold * \Imagick::getQuantum(),
        $channel
    );
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

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