code: def enhance_level_to_value(level, a=1.8, b=0.1):
      """Map from level to values."""
      return (level / _MAX_LEVEL) * a + b
  
imports: import copy
  import cv2
  import mmcv
  import numpy
  from ..builder import PIPELINES
  from .compose import Compose
label_desc: Use image node_id 2 for calling a global function with example usage: enhance_level_to_value(level, a, b) and returns: unknown