CALIBRATION TOOL DISPLAY DEVICE, CALIBRATION TOOL DISPLAY METHOD, CALIBRATION DEVICE, CALIBRATION METHOD, CALIBRATION SYSTEM AND PROGRAM

PROBLEM TO BE SOLVED: To provide a calibration tool display device which virtually generates a calibration tool and displays the image data of the tool projected on the display device in actual size, so that calibration is easily performed with improved accuracy by photographing the displayed image with a camera.SOLUTION: An electronic calibration tool is arranged in a virtual three-dimensional space provided in an arithmetic device 102. An image for determining a position in actual size on the basis of the display size and the number of pixels of a display device 101 is displayed. Cameras 107 to 110 to be calibrated photograph the displayed virtual calibration tool. From the corresponding relation between the position in actual size and the two-dimensional coordinates obtained from the photographed image, the three-dimensional positions of the cameras are calculated relative to the display plane. Furthermore, from the positional relation of each camera relative to the display plane, the three-dimensional position relative to each camera is calculated. The relative positional relations of the cameras can be thus obtained.