Abstract: The computer stores the plurality of first positions in the image captured by the image pickup device and the second positions corresponding to the plurality of first positions in the graphic corresponding to the image as a relationship. The computer acquires a third position related to the object in the image, a positional relationship between a part of the plurality of first positions and the third position, and one of the relationships. A method specifies a position in a figure corresponding to a position in an image including generating a fourth position in the figure corresponding to the third position using parts or all. In a method, a part of the plurality of first positions is three first positions closest to the third position among the plurality of first positions. A method includes generating the fourth position using the sides of a triangle composed of the three first positions.

Abstract: The computer stores the plurality of first positions in the image captured by the image pickup device and the second positions corresponding to the plurality of first positions in the graphic corresponding to the image as a relationship. The computer acquires a third position related to the object in the image, a positional relationship between a part of the plurality of first positions and the third position, and one of the relationships. A method specifies a position in a figure corresponding to a position in an image including generating a fourth position in the figure corresponding to the third position using parts or all. In a method, a part of the plurality of first positions is three first positions closest to the third position among the plurality of first positions. A method includes generating the fourth position using the sides of a triangle composed of the three first positions.

Abstract: A display device is provided with an optical waveguide, a transparent fixed electrode disposed in surface contact with the optical waveguide, and a transparent movable electrode disposed facing the transparent fixed electrode on a side opposite to the optical waveguide. When a driving voltage is applied, the transparent movable electrode is movable by an external force, between a first stable state in which it is kept apart from the transparent fixed electrode by elasticity, and a second stable state in which it makes insulated contact with the transparent fixed electrode by electrostatic force. There is no concern about contaminating the air or dirtying hands, and it is possible to write easily using a finger or a simple writing tool, and repeatedly erase.