code: def bicubic_degradation(x, sf=3):
      """
      Args:
          x: HxWxC image, [0, 1]
          sf: down-scale factor
      Return:
          bicubicly downsampled LR image
      """
      x = util.imresize_np(x, scale=1 / sf)
      return x
  
imports: import random
  from functools import partial
  import albumentations
  import cv2
  import ldm.modules.image_degradation.utils_image
  import numpy
  import scipy
  import scipy.stats
  import torch
  from scipy import ndimage
  from scipy.interpolate import interp2d
  from scipy.linalg import orth
label_desc: Use image node_id 11 for calling a global function with example usage: bicubic_degradation(x, sf) and returns: x