3. The method of claim 2 , wherein performing the bipartite matching comprises: selecting as the optimal set of assignments a set of assignments that minimizes a loss function that includes a localization loss term and a confidence loss term.
3. The method of claim 2 , wherein performing the bipartite matching comprises: selecting as the optimal set of assignments a set of assignments that minimizes a loss function that includes a localization loss term and a confidence loss term. 4. The method of claim 3 , wherein the location loss term for a particular set of assignments is based on, for each of the object locations, a distance in the training image between the object location and a candidate bounding box assigned to the object location by the particular set of assignments.