GoLang Imagick::thresholdImage

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PHP Imagick::thresholdImage

PHP original manual for Imagick::thresholdImage [ show | php.net ]

Imagick::thresholdImage

(PECL imagick 2.0.0)

Imagick::thresholdImage — Changes the value of individual pixels based on a threshold

Description

bool Imagick::thresholdImage ( float $threshold [, int $channel = Imagick::CHANNEL_DEFAULT ] )

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.

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();
}

?>