display woocommerce category image

$bannercat =rootstrap_get_option('rootstrap_banner_categories');// cat id by theme option
$term = get_term_by('term_id', $bannercat, 'product_cat'); //convert cat id to slug
$category_thumbnail = get_term_meta($term->term_id, 'thumbnail_id', true);// retrieve cat image id
$image = wp_get_attachment_url($category_thumbnail);//display cat image unique URL
$term_link = get_term_link( $term, 'product_cat' );//get cat term link