Body size estimation apparatus, body size estimation method, and program

A body size estimation apparatus, comprising:

• a position data acquisition unit configured to acquire position data indicating positions of a plurality of body parts away from each other of a user when the user is in motion in view of the body size estimation apparatus in an upright posture;
• an intermediate estimation unit configured to estimate, at predetermined intervals, arm lengths and a shoulder width of the user based on a position of a head of the user and positions of hands of the user that are indicated by the position data;
• and
• a body size estimation unit configured to update a body size of the user based on the estimated arm lengths and the estimated shoulder width of the user every time a newly determined body size is greater than a previously determined body size;
• wherein the body size estimation unit estimates a horizontal body size of the user based on the estimated arm lengths and the estimated shoulder width of the user,
• wherein the body size estimation unit estimates a height of the user based on the position of the head of the user and a position of a foot of the user that are indicated by the position data, and
• wherein the body size estimation unit estimates a height of the user based on the estimated arm lengths and the estimated shoulder width of the user.

A body size estimation method, comprising:

• acquiring position data indicating positions of a plurality of body parts away from each other of the user when the user is in motion,
• wherein each of the plurality of body party comprises a marker worn on the user;
• estimating a body size of the user based on the positions of the plurality of body parts indicated by the position data;
• updating, in a case where the estimated body size is larger than the body size indicated by the body size data stored in the body size data storage unit, the body size data such that the body size data indicates the estimated body size;
• storing, height data indicating a height of the user and arm length data indicating arm lengths of the user;
• estimating, at predetermined intervals, the height of the user based on a position of a head of the user and a position of a foot of the user that are indicated by the position data;
• estimating, at the predetermined intervals, positions of shoulders of the user based on the position of the head of the user indicated by the position data;
• estimating, at the predetermined intervals, each of arm lengths of the user based on a position of one of hands of the user indicated by the position data and the estimated position of the shoulder corresponding to the hand;
• updating, each time the estimated height is greater than the height indicated by the stored height data, the height data such that the height data indicates the estimated height;
• and
• updating, each time the estimated arm lengths are greater than the arm lengths indicated by the stored arm length data, the arm length data such that the arm length data indicates the estimated arm lengths.

A non-transitory computer readable medium having stored thereon a program for a computer, comprising:

• acquiring position data indicating positions of a plurality of body parts away from each other of the user when the user is in motion,
• wherein each of the plurality of body party comprises a marker worn on the user;
• estimating a body size of the user based on the positions of the plurality of body parts indicated by the position data;
• updating, in a case where the estimated body size is larger than the body size indicated by the body size data stored in the body size data storage unit, the body size data such that the body size data indicates the estimated body size;
• storing, height data indicating a height of the user and arm length data indicating arm lengths of the user;
• estimating, at predetermined intervals, the height of the user based on a position of a head of the user and a position of a foot of the user that are indicated by the position data;
• estimating, at the predetermined intervals, positions of shoulders of the user based on the position of the head of the user indicated by the position data;
• estimating, at the predetermined intervals, each of arm lengths of the user based on a position of one of hands of the user indicated by the position data and the estimated position of the shoulder corresponding to the hand;
• updating, each time the estimated height is greater than the height indicated by the stored height data, the height data such that the height data indicates the estimated height;
• and
• updating, each time the estimated arm lengths are greater than the arm lengths indicated by the stored arm length data, the arm length data such that the arm length data indicates the estimated arm lengths.