viewing depth map from openni2 compatible device with opencv2

test.py

#!/usr/bin/python
import cv2
import numpy as np
from primesense import openni2
from primesense import _openni2 as c_api
openni2.initialize("<PATH TO OPENNI2 REDIST FOLDER>")
dev = openni2.Device.open_any()
depth_stream = dev.create_depth_stream()
depth_stream.start()
depth_stream.set_video_mode(c_api.OniVideoMode(pixelFormat = c_api.OniPixelFormat.ONI_PIXEL_FORMAT_DEPTH_100_UM, resolutionX = 640, resolutionY = 480, fps = 30))
while True:
	frame = depth_stream.read_frame()
	frame_data = frame.get_buffer_as_uint16()
	img = np.frombuffer(frame_data, dtype=np.uint16)
	img.shape = (1, 480, 640)
	img = np.concatenate((img, img, img), axis=0)
	img = np.swapaxes(img, 0, 2)
	img = np.swapaxes(img, 0, 1)
	cv2.imshow("image", img)
	cv2.waitKey(34)
openni2.unload()

line 9 and 10 must be swapped, otherwise it is not going to work.