(PECL imagick 2.0.0)
Imagick::spreadImage — Randomly displaces each pixel in a block
$radius
   )Special effects method that randomly displaces each pixel in a block defined by the radius parameter.
radius
   Returns TRUE on success.
  
Throws ImagickException on error.
Example #1 Imagick::spreadImage()
<?php
function spreadImage($imagePath, $radius) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->spreadImage($radius);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}
?>