text: # this class contains all relevant infomation 
  # which will be propagated through the sections of the pipeline.
  # each pipeline function takes one object as parameter and reads, writes 
  # and/or returns the modified object for following operations.
  class CurrentIterationItem:
  
      time_after_expr_rec = 0
      color_frame = None
      depth_frame = None
      segmented_frame = None
      _cv2 = None
  
      def __init__(self, start_time_current, start_time_old, time_at_start, process_next_frame, frame_number):
          self.start_time_current = start_time_current
          self.start_time_old = start_time_old
          self.time_at_start = time_at_start
          self.process_next_frame = process_next_frame
          self.frame_number = frame_number