Imagick::transparentPaintImage

(No version information available, might only be in Git)

Imagick::transparentPaintImage — Paints pixels transparent

˵��

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

Paints pixels matching the target color transparent. �˷�����Imagick����ImageMagick 6.3.8���ϰ汾����ʱ���á�

����

target

The target color to paint

alpha

͸������1.0 ����ȫ��͸����0.0 ����ȫ͸����

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.

����ֵ

�ɹ�ʱ���� TRUE��

����

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();
}

?>