code: def add_snow(img, snow_point, brightness_coeff):
      
      non_rgb_warning(img)
  
      input_dtype = img.dtype
      needs_float = False
  
      snow_point *= 127.5  # = 255 / 2
      snow_point += 85  # = 255 / 3
  
      if input_dtype == np.float32:
          img = from_float(img, dtype=np.dtype('uint8'))
          needs_float = True
      elif input_dtype not in (np.uint8, np.float32):
          raise ValueError('Unexpected dtype {} for RandomSnow augmentation'.format(input_dtype))
  
      image_HLS = cv2.cvtColor(img, cv2.COLOR_RGB2HLS)
      image_HLS = np.array(image_HLS, dtype=np.float32)
  
      image_HLS[:, :, 1][image_HLS[:, :, 1] < snow_point] *= brightness_coeff
  
      image_HLS[:, :, 1] = clip(image_HLS[:, :, 1], np.uint8, 255)
  
      image_HLS = np.array(image_HLS, dtype=np.uint8)
  
      image_RGB = cv2.cvtColor(image_HLS, cv2.COLOR_HLS2RGB)
  
      if needs_float:
          image_RGB = to_float(image_RGB, max_value=255)
  
      return image_RGB
docs: Bleaches out pixels, mitation snow.
  
      From https://github.com/UjjwalSaxena/Automold--Road-Augmentation-Library
  
      Args:
          img:
          snow_point:
          brightness_coeff:
  
      Returns: