Abstract: The relationship between space coordinates and a plurality of feature amounts gained from at least a pattern or a change in the pattern that has been projected from a plurality of projection units is found in advance, and the relationship between the feature amounts and the space coordinates is used in order to find the space coordinates of the surface of an object from the feature amounts that have been gained from a pattern or a change in the pattern projected from the plurality of projection units onto the surface of the object.

Abstract: The relationship between space coordinates and a plurality of feature amounts gained from at least a pattern or a change in the pattern that has been projected from a plurality of projection units is found in advance, and the relationship between the feature amounts and the space coordinates is used in order to find the space coordinates of the surface of an object from the feature amounts that have been gained from a pattern or a change in the pattern projected from the plurality of projection units onto the surface of the object.

Abstract: A motor-driven vehicle includes a vehicle body including a handlebar, a drive wheel mounted to the vehicle body, a driving unit for driving the drive wheel, and a manual-driving-force sensing unit for sensing a manual driving force exerted to the handlebar to move the vehicle body and generating a control signal for controlling the driving unit in accordance with the sensed manual driving force. The manual-driving-force sensing unit includes a displaceable grip mounted displaceable along the length of said handlebar, a potentiometer for sensing displacement of the grip and generating the control signal in accordance with the sensed displacement of the grip, first and second stop members disposed spaced from each other along the length of the handlebar, a spring having one end contacting the first stop member and having the other end contacting the second stop member, and a piston having first and second portions adjacent to said first and second stop members, respectively, for driving the spring.