Figure 4: Virtual electronic measuring instrument
Figure 4 shows an example of superimposing the output from the electronic measuring instrument by the half mirror. Thus, the worker can know the measured result without turning his/her eyes away largely from the work object. The situation of the figure is that the output result of a measuring instrument (an ohm-meter) is displayed in the upper part.. As the set of two cameras is tracking the work target in real time, the measured result can be displayed following the moved work object. The measured results are not to be displayed in number, but in good looking graphics. Sometime, graphical metaphor of a real instrument is one of excellent display.