text: void crop_and_resize_forward(
      THFloatTensor * image,
      THFloatTensor * boxes,      // [y1, x1, y2, x2]
      THIntTensor * box_index,    // range in [0, batch_size)
      const float extrapolation_value,
      const int crop_height,
      const int crop_width,
      THFloatTensor * crops
  );
  
  void crop_and_resize_backward(
      THFloatTensor * grads,
      THFloatTensor * boxes,      // [y1, x1, y2, x2]
      THIntTensor * box_index,    // range in [0, batch_size)
      THFloatTensor * grads_image // resize to [bsize, c, hc, wc]
  );