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Imagick::randomThresholdImage

PHP function Edit on GitHub ✎

(PECL imagick 2, PECL imagick 3)

Creates a high-contrast, two-color image

Description

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. 0x629

Parameters

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.

Return Values

Success

Examples

Imagick::randomThresholdImage()

php

<?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();
}

?>

Source: reference/imagick/imagick/randomthresholdimage.xml · from the official PHP manual (php/doc-en)