Validation of position estimation during social interaction.

A: An example of the estimated positions of body parts is shown, where the spheres, points and gray wireframe cube represent the models, the reconstructed 3D image, and the recording chamber, respectively. The corresponding movie is available as Movie S1. B: Cumulative frequency of occurrence of significant problems over 60 sec. C: Averaged errors of estimated positions for the head, neck trunk, and hip at each timing in the 1-min period. Exp 1: the experimenter 1; Exp 2: the experimenter 2; Com: the present system. Error bars: SD.