code: def generate_anchors(
      base_size=16, ratios=[0.5, 1, 2], scales=2 ** np.arange(3, 6)
  ):
      """
      Generate anchor (reference) windows by enumerating aspect ratios X
      scales wrt a reference (0, 0, 15, 15) window.
      """
  
      base_anchor = np.array([1, 1, base_size, base_size]) - 1
      ratio_anchors = _ratio_enum(base_anchor, ratios)
      anchors = np.vstack(
          [
              _scale_enum(ratio_anchors[i, :], scales)
              for i in range(ratio_anchors.shape[0])
          ]
      )  # was xrange
      return anchors
  
imports: import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: generate_anchors(base_size, ratios, scales) and returns: anchors