How to Resize external images in magento

How to Resize external images in magento

$largeImage = Mage::getBaseDir('media').DS . "YourImage.jpg";
$resizedImage = Mage::getBaseDir('media').DS."banner".DS."YourImage.jpg";

 if (!file_exists($resizedImage )&&file_exists($largeImage )) :
    $imageObj = new Varien_Image($largeImage );
    $imageObj->constrainOnly(TRUE);
    $imageObj->keepAspectRatio(TRUE);
    $imageObj->keepFrame(FALSE);
    $imageObj->resize(150, 150);
    $imageObj->save($resizedImage );
 endif;

That's it... Enjoy Chandresh rana's Coding.... :)