Validation of enhanced kinect sensor based motion capturing for gait assessment
Fig 3
Markers and bipartite graph used for the spatial calibration.
(A) The shape of the markers is easily detectable in the RGB image; the white squares in the center encode the marker id [20]. The red circles indicate the salient points which have been used for defining the position and orientation of the marker. (B) Graph illustrating the “sees / is seen” relation (edges) between sensors (blue vertices) and markers (red vertices). For example, S3 cannot see M1 directly but indirectly via M2 and S2. A second possibility is via M2 and S5.