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();
}
?>
 
                     
                     
                     
                     
                    
 
          