If you want to test this program,
- Download the apk file.
 - Install it on your mobile phone.
 - Prepare a planar thing with high texture (ex. book cover).
 - Run the app.
 - Select "Capture new reference" in the menu.
 - Then, you can register the planar thing as a new reference by clicking the screen.
 - Freely move your phone and see the result.