Imagick::blackThresholdImage

    (PECL imagick 2, PECL imagick 3)

    Imagick::blackThresholdImage — Forces all pixels below the threshold into black

    Beschreibung

    publicImagick::blackThresholdImage(mixed$threshold): bool

    Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.

    Parameter-Liste

    threshold

    The threshold below which everything turns black

    Rückgabewerte

    Liefert true bei Erfolg.

    Changelog

    VersionBeschreibung
    PECL imagick 2.1.0 Now allows a string representing the color as a parameter. Previous versions allow only an ImagickPixel object.

    Beispiele

    Beispiel #1 Imagick::blackThresholdImage()

    <?php
    function blackThresholdImage($imagePath, $thresholdColor) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->blackthresholdimage($thresholdColor);
    header("Content-Type: image/jpg");
    echo     $imagick->getImageBlob();
    }

    ?>
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