CameraDevicePreference Enum

Constant	Value	Description
PreferObjectSensing	0	Optimized for ImageTracker , ObjectTracker and CloudRecognizer .
PreferSurfaceTracking	1	Optimized for SurfaceTracker .
PreferMotionTracking	2	Optimized for Motion Tracking . But to use Motion Tracking, it is preferred to use MotionTrackerCameraDevice .