(PECL imagick 2.0.0)
Imagick::enhanceImage — Improves the quality of a noisy image
Applies a digital filter that improves the quality of a noisy image.
   Returns TRUE on success.
  
Throws ImagickException on error.
Example #1 Imagick::enhanceImage()
<?php
function enhanceImage($imagePath) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->enhanceImage();
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}
?>