PHPで画像のメインカラーを取得する方法の紹介

<?php
$average = new Imagick("./fruit/143511081321676_593.jpg");
$average->quantizeImage( 10, Imagick::COLORSPACE_RGB, 0, false, false );
$average->uniqueImageColors();
function GetImagesColor( Imagick $im ){
  $colorarr = array();
  $it = $im->getPixelIterator();
  $it->resetIterator();
  while( $row = $it->getNextIteratorRow() ){
    foreach ( $row as $pixel ){
      $colorarr[] = $pixel->getColor();
    }
  }
  return $colorarr;
}
$colorarr = GetImagesColor($average);
foreach($colorarr as $val){
  $r += $val[&#39;r&#39;];
  $g += $val[&#39;g&#39;];
  $b += $val[&#39;b&#39;];
  echo "<p style=&#39;background-color: rgb({$val[&#39;r&#39;]},{$val[&#39;g&#39;]},{$val[&#39;b&#39;]});width:50px;height:50px;float:left;&#39;></p>";
}
$r = round($r/10);
$g = round($g/10);
$b = round($b/10);
echo "<br><p style=&#39;background-color: rgb({$r},{$g},{$b});width:100px;height:100px;float:left;&#39;></p>";
?>