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Imagick::negateImage

PHP function Edit on GitHub ✎

(PECL imagick 2, PECL imagick 3)

Negates the colors in the reference image

Description

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

Success

Errors/Exceptions

Throws

Examples

Imagick::negateImage()

php

<?php
function negateImage($imagePath, $grayOnly, $channel) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->negateImage($grayOnly, $channel);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

Source: reference/imagick/imagick/negateimage.xml · from the official PHP manual (php/doc-en)