Imagick::negateImage
(PECL imagick 2, PECL imagick 3)
Imagick::negateImage — Negates the colors in the reference image
Description
public Imagick::negateImage ( bool $gray [, int $channel = Imagick::CHANNEL_DEFAULT ] ) : bool
Negates the colors in the reference image. The Grayscale option means that only grayscale values within the image are negated.
Parameters
-
gray -
Whether to only negate grayscale pixels within the image.
-
channel -
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.
Return Values
Returns true on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 Imagick::negateImage()
<?php
function negateImage($imagePath, $grayOnly, $channel) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->negateImage($grayOnly, $channel);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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https://www.php.net/manual/en/imagick.negateimage.php