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1. An information processing device comprising at least one memory and at least one processor which function as: a first acquisition unit configured to acquire inertial information indicating inertial values, which are accelerations or angular velocities of an inertial sensor, from the inertial sensor; a second acquisition unit configured to acquire position and orientation information indicating at least one of a position and an orientation of the inertial sensor; a control unit for configured to control a display for displaying a guide that instructs a user to perform each of a plurality of patterns of motions including two translational motions or two rotational motions, the two translational motions including a translational motion of the inertial sensor corresponding to a first axis and a translational motion of the inertial sensor corresponding to a second axis perpendicular to the first axis, and the two rotational motions including a rotational motion of the inertial sensor corresponding to the first axis and a rotational motion of the inertial sensor corresponding to the second axis; and a parameter acquisition unit configured to acquire parameters including a degree of correlation between actual inertial values of the inertial sensor corresponding to the first axis and the inertial information corresponding to the second axis, based on the inertial information and the position and orientation information acquired when the plurality of patterns of motions of the inertial sensor are performed; and wherein the inertial sensor is mounted on a hand of the user, the display displays a composite image in which a virtual object is placed in an image obtained by capturing a real space, and the control unit controls the display to display the guide with which a guide point indicating a position to which the hand is to be moved is superimposed on the virtual object in the composite image.
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