[Plugin: NextGEN Gallery] Exclude galleries/albums from count

I am using the following code to display the number of images/galleries/albums and it is working perfectly.

global $wpdb;
$images    = intval( $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->nggpictures") );
$galleries = intval( $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->nggallery") );
$albums    = intval( $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->nggalbum") );

echo 'At a Glance<br />';
echo $images;
echo ' images<br />';
echo $galleries;
echo ' galleries<br />';
echo $albums;
echo ' albums.';

I would however like to expand on this and exclude certain galleries/albums. The number of images will reduce in accordance to the gallery/album I have excluded. For example: I have a total of 100 images, 10 galleries and 5 albums. I would like to reduce this down to 5 galleries and 3 albums and it will have a total of 50 images.

Can this be achieved?