Imagick::negateImage

    (PECL imagick 2, PECL imagick 3)

    Imagick::negateImage — Negates the colors in the reference image

    Description

    public Imagick::negateImage(bool $gray, int $channel = Imagick::CHANNEL_DEFAULT): bool

    Negates the colors in the reference image. The Grayscale option means that only grayscale values within the image are negated.

    Parameters

    gray

    Whether to only negate grayscale pixels within the image.

    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

    Returns true on success.

    Errors/Exceptions

    Throws ImagickException on error.

    Examples

    Example #1 Imagick::negateImage()

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

    ?>

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