| http://www.w3.org/ns/prov#value | - FIG. 7D is a view, showing the relationship between the object and ranging light assumed in a case where one edge portion of the object which is superposed upon the center of the spot of ranging light is selected at the first time point; the direction of projection of the ranging light is altered; and the movement speed of the object is calculated by measuring only a distance to the one of edge po
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