code: def __init__(self):
      self.args = self.get_parser().parse_args()
      self.frcnn, self.frcnn_cfg = self._build_detection_model()
  
file_path: mmf/tools/scripts/features/frcnn/extract_features_frcnn.py
imports: import argparse
  import copy
  import logging
  import os
  import numpy
  import torch
  from tools.scripts.features.extraction_utils import chunks, get_image_files
  from tools.scripts.features.frcnn.frcnn_utils import Config
  from tools.scripts.features.frcnn.modeling_frcnn import GeneralizedRCNN
  from tools.scripts.features.frcnn.processing_image import Preprocess
label_desc: Use image node_id 1 to create a new FeatureExtractor object  with example: obj = FeatureExtractor()