OFFSET CALCULATION DEVICE, OFFSET CORRECTION DEVICE, AND OFFSET CALCULATION METHOD

An offset calculation device includes a determination unit configured to determine a rotation state of an object having an angular velocity sensed by a gyro sensor based on a moving average value of sensed angular velocity during a plurality of time periods differing from each other, the moving average value being calculated from chronological data of numerical values corresponding to the sensor data output from the gyro sensor. The offset calculation device further includes a calculation unit configured to calculate an offset value of the sensor data based on the sensor data corresponding to a time period in which the target object was deemed to be in a non-rotation state by the determination unit.