A configuration for measuring the position and the orientation specific to a mixed reality is separated from an application 70 to operate independently, and a shared memory 60 or process-to-process communication is used for data communication between them. The compact-size image-sensing device is composed of a plurality of image-sensing elements that are connected to one another and is connected to a signal output terminal bus. At least one selectable capacitor is provided for each IC circuit element, such as a logic network, whose operational characteristic is predicted to be and is actually identified as sub-optimal through IC testing, particularly following a process change, a mask shrink, operation of the IC at higher clock frequency, or the like.