Summary: 8 instances, 8 unique

Text	Count
# FIXME h_boxes takes the last one computed, keep this in mind	1
# TODO this is a hack	1
# TODO make it support different-sized images	1
# TODO make this more general	1
# TODO this should probably be a separate loss, not hacked in this one here	1
# FIXME should we update the area here if there are no boxes?	1
# TODO find a better way of exposing other arguments	1
# TODO use valid to mask invalid areas due to padding in loss	1