Hi,
In the template of the single post type, you can add this code to show the image of the taxonomy
$terms = get_the_terms( get_queried_object_id(), 'publisher' );
foreach ( $terms as $term ) {
$term_image = rwmb_meta( 'publisher_image', ['object_type' => 'term'], $term->term_id );
if( is_array( $term_image ) ) {
echo '<img src="'. $term_image['full_url'] .'">';
}
}