A client computer collects registration information regarding a user andor the client computer and attempts to upload the collected information to a remote registration system. On the other hand, a video-encoding system extracts back the auxiliary packets superposed on the V-blanking area and the H-blanking area from an input base-band video signal. Thereby, distance measurement is able to be performed over a wide range without a complicated operation in the image measurement device for measuring a distance between two regions by using an image. The stress relaxation member 4 is formed of an aluminum plate 10 having a plurality of through holes 9 formed therein, and the through holes 9 serve as stress-absorbing spaces. The captured information may be aggregated according to the sub-events by use of sub-event identifiers for presentation to users, e.