$ cd $HOME/src/PaintsChainer
$ python cgi-bin/paint_x2_unet/painter.py
start
load model
Launch GIMP (Options for debug):
$ gimp-2.8 -c --verbose
On GIMP, open your line image (as line layer).
Add a transparent layer (as color hint layer) above the line layer.
Select the color hint layer, and run plug-in through menu: Filters/Artistic/_Paints Chainer