config.json

{
    "model_type": "detectron2",
    "architectures": ["MaskRCNN"],
    "num_classes": 3, 
    "input_size": [800, 1333], 
    "pretrained": false,
    "max_iter": 1000,
    "batch_size": 2,
    "learning_rate": 0.00025
  }