(PECL imagick 2, PECL imagick 3)
Imagick::charcoalImage — Simulates a charcoal drawing
public Imagick::charcoalImage(float $radius, float $sigma): bool
Simulates a charcoal drawing.
radiusThe radius of the Gaussian, in pixels, not counting the center pixel
sigmaThe standard deviation of the Gaussian, in pixels
Returns true on success.
Example #1 Imagick::charcoalImage()
<?php
function charcoalImage($imagePath, $radius, $sigma) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->charcoalImage($radius, $sigma);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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https://www.php.net/manual/en/imagick.charcoalimage.php