Imagick::thresholdImage

    (PECL imagick 2, PECL imagick 3)

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

    Description

    publicImagick::thresholdImage(float$threshold, int$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.

    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();
    }

    ?>
    To Top