code: def image_sample(shape, decorrelate=True, sd=None, decay_power=1):
      raw_spatial = rand_fft_image(
          shape, sd=sd, decay_power=decay_power
      )
      return to_valid_rgb(raw_spatial, decorrelate=decorrelate)
  
imports: import tensorflow
  import numpy
  from lucid.optvis.param.color import to_valid_rgb
  from lucid.optvis.param.spatial import rfft2d_freqs
label_desc: Use image node_id 1 for calling a global function with example usage: image_sample(shape, decorrelate, sd, decay_power) and returns: to_valid_rgb