Wearable computing users cannot be expected to carry
fiducial markers with them at all times. We developed a
vision-based user interface that can track the user’s outstretched hand robustly and use it as the reference pattern for
AR inspection. To this end, we present a method of tracking
the fingertip configuration of a single hand posture, and use
it for camera pose estimation. In Figure 2, the overall flow
of the system is illustrated. In a one-time off-line calibration