code: def gbb_form(boxes):
      xy, wh, angle = paddle.split(boxes, [2, 2, 1], axis=-1)
      return paddle.concat([xy, wh.pow(2) / 12.0, angle], axis=-1)
  
file_path: PaddleDetection/ppdet/modeling/losses/probiou_loss.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import paddle
  import paddle.nn.functional
  from ppdet.core.workspace import register, serializable
label_desc: Use image node_id 1 for calling a global function with example usage: gbb_form(boxes) and returns: paddle