Change the brightness and/or contrast of an image
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    Imagick::brightnessContrastImage

    (PECL imagick 3 >= 3.3.0)

    Imagick::brightnessContrastImage — Change the brightness and/or contrast of an image

    Description

    public Imagick::brightnessContrastImage(float $brightness, float $contrast, int $channel = Imagick::CHANNEL_DEFAULT): bool

    Change the brightness and/or contrast of an image. It converts the brightness and contrast parameters into slope and intercept and calls a polynomical function to apply to the image.

    Parameters

    brightness

    contrast

    channel

    Return Values

    Returns true on success.

    Examples

    Example #1 Imagick::brightnessContrastImage()

    <?phpfunction brightnessContrastImage($imagePath, $brightness, $contrast, $channel) {    $imagick = new \Imagick(realpath($imagePath));    $imagick->brightnessContrastImage($brightness, $contrast, $channel);    header("Content-Type: image/jpg");    echo $imagick->getImageBlob();}?>