Disclosed herein are computer-implemented methods, computer-implemented systems, and non-transitory, computer-readable media for evaluating performance of an object detection model. One computer-implemented method includes generating a predicted bounding box representing an object based on the object detection model, where the object is positioned proximate to one or more adjacent objects. An area of intersection is determined between the predicted bounding box and a groundtruth bounding box of the object. A modified area of union is determined between the predicted bounding box and the groundtruth bounding box of the object. A score equal to the area of intersection between the predicted bounding box and the groundtruth bounding box of the object divided by the modified area of union is determined, where the score represents the performance of the object detection model.