--- ui/gui_draw.py.orig    2017-05-19 12:52:25.000000000 +0800
+++ ui/gui_draw.py 2017-05-19 12:53:07.648466907 +0800
@@ -12,6 +12,9 @@
 import glob
 import sys
 from pdb import set_trace as st
+
+import matplotlib as mpl
+mpl.use("Qt4Agg")
 import matplotlib.pyplot as plt
 
 import skimage