Making domdocument img search more lightweight

Question

This grabs all images from a page, and is supposed to check if image has more width and height than 200. if so, grab the first of it. But its an expensive process, and im wondering if there are more lightweight approaches to this than using getimagesize. Does anyone know of a different approach without the use of external services like YQL etc?

if($ogimage!=''|| !empty($ogimage)){
    $arrimg = $ogimage;
} else {
    $imgarr = array();
foreach ($doc->getElementsByTagName('img') as $img) {
    $arrimg_push = $img->getAttribute('src');
    array_push($imgarr, $arrimg_push);
}
    $i=0;
    foreach($imgarr as $img){
     list($width, $height, $type, $attr) = getimagesize($img);
        if($width > 200 && $height > 200){
            if($i > 0){
            $arrimg = $img;
            $i++;
            }
        }
    }
}

Answer 1

ImageMagick's pingImage or pingImageFile will read as little of the image file as possible to get the basic attributes, which can then be accessed using getImageWidth and getImageHeight.