simpleimageclassifier/src/simpleimageclassifier/configs/COCO-InstanceSegmentation/mask_rcnn_R_50_C4_1x.yaml

_BASE_: "../Base-RCNN-C4.yaml"
MODEL:
  WEIGHTS: "detectron2://ImageNetPretrained/MSRA/R-50.pkl"
  MASK_ON: True
  RESNETS:
    DEPTH: 50