VisionLib - Virtual Tracking Test Object
You can track these objects using the VisionLib Demo App. Hold your smartphone parallel to the screen. Rotate the objects with the mouse, if necessary.
Please note: They may look like 3D objects, but you are looking at a realtime rendering on a 2D screen. If the tracking is strange or just bad, it is because VisionLib realizes that these aren't real 3D objects, but only 2D projections.