Abstract: A drawing device according to the present disclosure includes a device body that includes a drawing screen of a liquid crystal screen, a pressure sensor provided on the drawing screen and configured to detect pressure on the drawing screen, an eraser bar provided in the device body and configured to slide along the drawing screen, an eraser bar position detection port as an eraser bar position sensor configured to detect a position of the eraser bar, and a control unit configured to perform a drawing process in which a picture is drawn on the drawing screen along a position where the pressure on the drawing screen is detected. The control unit is configured to erase the picture on the drawing screen in accordance with a moving range of the eraser bar when the eraser bar is moved.

Abstract: From a moving image obtained by capturing a marker, a change of a shape of an image region of the marker is detected. A shape of a display image is controlled in accordance with the change and a display screen of the display apparatus is caused to display the display image after the controlling.

Abstract: A drawing device according to the present disclosure includes a device body that includes a drawing screen of a liquid crystal screen, a pressure sensor provided on the drawing screen and configured to detect pressure on the drawing screen, an eraser bar provided in the device body and configured to slide along the drawing screen, an eraser bar position detection port as an eraser bar position sensor configured to detect a position of the eraser bar, and a control unit configured to perform a drawing process in which a picture is drawn on the drawing screen along a position where the pressure on the drawing screen is detected. The control unit is configured to erase the picture on the drawing screen in accordance with a moving range of the eraser bar when the eraser bar is moved.