Head mounted display apparatus and control method therefor, and computer program

A control method for a head mounted display apparatus including a display unit by which an outside world can be transmissively visually recognized, comprising:

• allowing the display unit to display a predetermined image in correspondence with a position of a subject in the outside world transmissively visually recognized;
• acquiring view range movement information representing a motion of the display unit;
• and
• acquiring subject movement information representing a relative motion of the subject to the display unit,
• wherein, when the acquired view range movement information and the acquired subject movement information are substantially not matched, the allowing the display unit to display the predetermined image estimates a relative position of the subject to the display unit after a predetermined time based on at least the subject movement information, and determines a display position of the predetermined image based on the estimated relative position.

A computer program for controlling a head mounted display apparatus including a display unit by which an outside world can be transmissively visually recognized, allowing a computer to realize:

• a function of allowing the display unit to display a predetermined image in correspondence with a position of a subject in the outside world transmissively visually recognized;
• a function of acquiring view range movement information representing a motion of the display unit;
• and
• a function of acquiring subject movement information representing a relative motion of the subject to the display unit,
• wherein, when the acquired view range movement information and the acquired subject movement information are substantially not matched, the function of allowing the display unit to display the predetermined image estimates a relative position of the subject to the display unit after a predetermined time based on at least the subject movement information, and determines a display position of the predetermined image based on the estimated relative position.