/**
	 * Returns the center of the image coordinates
	 *
	 * @param string $sImage Full path to the image
         * @param int $iWidthCenter The width of the central image
         * @param int $iHeightCenter The height of the central image
	 * @return array Offsets from the top and left edges
	 */        
        public function getCenterImage($sImage, $iWidthCenter, $iHeightCenter)
        {
                $aImageSize = getimagesize($sImage);
                
                $iMarginTop = (($aImageSize[0] - $iHeightCenter) / 2);
                $iMarginLeft = (($aImageSize[1] - $iWidthCenter) / 2);
                
                return array(round($iMarginTop), round($iMarginLeft));
        }