(PECL imagick 2, PECL imagick 3)
Imagick::adaptiveSharpenImage — Adaptively sharpen the image
$radius, float $sigma, int $channel = Imagick::CHANNEL_DEFAULT): boolAdaptively sharpen the image by sharpening more intensely near image edges and less intensely far from edges. Questo metodo è disponibile se Imagick è stato compilato con ImageMagick versione 6.2.9 o successive.
radiusThe radius of the Gaussian, in pixels, not counting the center pixel. Use 0 for auto-select.
sigmaThe standard deviation of the Gaussian, in pixels.
channel
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. Per default è Imagick::CHANNEL_DEFAULT. Fare riferimento a questa lista di costanti di canale
Restituisce true in caso di successo.
Example #1 A Imagick::adaptiveSharpenImage() example
Adaptively sharpen the image with radius 2 and sigma 1.
<?php
try {
$image = new Imagick('image.png');
$image->adaptiveSharpenImage(2,1);
} catch(ImagickException $e) {
echo 'Error: ' , $e->getMessage();
die();
}
header('Content-type: image/png');
echo $image;
?>