Imagick::transparentPaintImage

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

Imagick::transparentPaintImage — Paints pixels transparent

说锟斤拷

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

Paints pixels matching the target color transparent. 锟剿凤拷锟斤拷锟斤拷Imagick锟斤拷锟斤拷ImageMagick 6.3.8锟斤拷锟较版本锟斤拷锟斤拷时锟斤拷锟矫★拷

锟斤拷锟斤拷

target: The target color to paint
alpha: 透锟斤拷锟斤拷锟斤拷1.0 锟斤拷锟斤拷全锟斤拷透锟斤拷锟斤拷0.0 锟斤拷锟斤拷全透锟斤拷锟斤拷
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.

锟斤拷锟斤拷值

锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷

锟斤拷锟斤拷

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();
}

?>