Possible uses of new WP RSS Images plugin

<?php

// These functions could go into the functions.php in your theme, or form
// part of another plugin.

/**
 * Hooks the WP wp_rss_image_size filter
 *
 * @param
 * @return void
 **/
function sw_wp_rss_image_size( $size ) {
    $size = 'large-feature';
    return $size;
}
add_filter( 'wp_rss_image_size', 'sw_wp_rss_image_size' );

/**
 * Hooks the WP wp_rss_image_alternative filter
 *
 * @param
 * @return void
 **/
function sw_wp_rss_image_alternative( $false, $post_id ) {
    $post = get_post( $post_id );
    $img_url = $false;
    if ( $thumbnail_id = get_post_thumbnail_id( $post->ID ) ) {
        $img = wp_get_attachment_image_src( $thumbnail_id, 'small-feature' );
        $img_url = $img[ 0 ];
    }
    return $img_url;
}
add_filter( 'wp_rss_image_alternative', 'sw_wp_rss_image_alternative', 10, 2 );


?>