API example that demonstrates marker detection API.

Please follow the instructions below to run the example:

1. Build and install the app onto your device.
2. Print one or a few markers from the attached ar_markers.pdf file. Please print the marker on a Letter size paper, without using any zooming or scaling factor. Please measure every side of the marker using a ruler to make sure it is 14cm.
3. Place the printed marker(s) on a flat surface, tables or walls.
4. Run the example app from your device, and point the device camera to the printed markers.
5. For every marker detected, the boundary and the axes of the local frame will be displayed. For the X, Y and Z axes of the local frame, RED, GREEN and BLUE lines will be displayed.