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(); } ?>
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/imagick.transparentpaintimage.php