A platform exercise apparatus includes a planar platform adapted for use on a floor and elevated therefrom with an elevating portion. The system also includes a calibrator component that jointly calibrates the color camera and the depth sensor based at least in part upon the first digital image and the second digital image. Pursuant to a preferred approach binary bits as correspond to, for example, fixed andor non-fixed information are provided and then converted into the aforementioned ternary data. The circuit 13 controls the onoff state of the element Q11 so as to provide the lamp with lamp power larger than lamp power by the constant lamp power control based on high power control for a period of time that the lamp is on.