A Classifier That Can Say "Not Mine"
A camera looks down at a road. A truck passes underneath and the system has to say what it’s carrying. Some materials are coarse families that split into commercial grades; the grades matter for billing, and they look similar enough that a single flat classifier over every leaf class does poorly. So it’s staged: a coarse model picks the family, then a specialist refiner splits that family into products. Standard hierarchical classification. ...