Imagick::transparentPaintImage

    (PECL imagick 2 >= 2.3.0, PECL imagick 3)

    Imagick::transparentPaintImage — Paints pixels transparent

    Description

    public Imagick::transparentPaintImage(
        mixed $target,
        float $alpha,
        float $fuzz,
        bool $invert
    ): bool

    Paints pixels matching the target color transparent. This method is available if Imagick has been compiled against ImageMagick version 6.3.8 or newer.

    Parameters

    target

    The target color to paint

    alpha

    The level of transparency: 1.0 is fully opaque and 0.0 is fully transparent.

    fuzz

    The amount of fuzz. For example, set fuzz to 10 and the color red at intensities of 100 and 102 respectively are now interpreted as the same color.

    invert

    If true paints any pixel that does not match the target color.

    Return Values

    Returns true on success.

    Examples

    Example #1 Imagick::transparentPaintImage()

    <?php
    function transparentPaintImage($color, $alpha, $fuzz) {
    $imagick = new \Imagick(realpath("images/BlueScreen.jpg"));

    //Need to be in a format that supports transparency
    $imagick->setimageformat('png');

    $imagick->transparentPaintImage(
    $color, $alpha, $fuzz * \Imagick::getQuantum(), false
    );

    //Not required, but helps tidy up left over pixels
    $imagick->despeckleimage();

    header("Content-Type: image/png");
    echo     $imagick->getImageBlob();
    }

    ?>

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    User Contributed Notes 1 note

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    1
    josecarlosphp
    10 months ago
    The $color parameter can be a string like this:

    "rgb(255, 255, 255)"

    As you can guess, that example represents white color.
    "rgb" indicates red-green-blue, and numeric values are amounts for each, from 0 to 255.

    Black color it will be "rgb(0, 0, 0)".
    Full red color it will be "rgb(255, 0, 0)".
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