Good question, we use the same method as coco, described in https://arxiv.org/pdf/1405.0312.pdf https://arxiv.org/pdf/1405.0312.pdf and implemented in the coco

Good question, we use the same method as coco, described in https://arxiv.org/pdf/1405.0312.pdf https://arxiv.org/pdf/1405.0312.pdf and implemented in the coco evaluation scripts here: https://github.com/cocodataset/cocoapi/blob/master/PythonAPI/pycocotools/cocoeval.py#L278 https://github.com/cocodataset/cocoapi/blob/master/PythonAPI... -- basically the best matching proposal, ground truth pair