preprocess/detectron2/configs/COCO-Detection/retinanet_R_50_FPN_3x.yaml

_BASE_: "../Base-RetinaNet.yaml"
MODEL:
  WEIGHTS: "detectron2://ImageNetPretrained/MSRA/R-50.pkl"
  RESNETS:
    DEPTH: 50
SOLVER:
  STEPS: (210000, 250000)
  MAX_ITER: 270000