Imagick::unsharpMaskImage
(PECL imagick 2, PECL imagick 3)
Imagick::unsharpMaskImage — Sharpens an image
Beschreibung
float
$radius
,float
$sigma
,float
$amount
,float
$threshold
,int
$channel
= Imagick::CHANNEL_DEFAULT): bool
Sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and Imagick::UnsharpMaskImage() selects a suitable radius for you.
Parameter-Liste
-
radius
-
-
sigma
-
-
amount
-
-
threshold
-
-
channel
-
Rückgabewerte
Liefert true
bei Erfolg.
Fehler/Exceptions
Wirft ImagickException bei Fehlern.
Beispiele
Beispiel #1 Imagick::unsharpMaskImage()
<?php
function unsharpMaskImage($imagePath, $radius, $sigma, $amount, $unsharpThreshold) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->unsharpMaskImage($radius, $sigma, $amount, $unsharpThreshold);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>