Imagick::randomThresholdImage

(PECL imagick 2.0.0)

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

Descrierea

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. Această metodă este disponibilă dacă Imagick a fost compilat cu ImageMagick de versiunea 6.2.9 sau ulterior.

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.

Valorile întoarse

Întoarce TRUE în caz de succes.

Exemple

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();
}

?>