Patent Document ID: 9642521
Application ID: 14553991
Patent Status: 1

Claim One:
1. An automatic pupillary distance (PD) measuring method using a camera and an user interface (UI), wherein the measuring method is performed using a processor of an electronic device, comprising: notifying a user to move his head position to a center of a captured face image; generating facial tracking of the captured face image; generating, from a determined center of the captured face image and from the facial tracking, an elliptical frame that moves and follows a moving head of the user; notifying the user to place a credit card inside a card window and deriving a reference length from said credit card; showing the elliptical frame of the moving head of the user over the captured face image; showing a target elliptical frame that is fixed at a center of the captured face image; aligning the elliptical frame of the moving head thereof with the target elliptical frame by the user moving his or her head forward or backward to fit the elliptical frame of the moving head within the target elliptical frame, thereby maintaining a correct head posture; and allowing the elliptical frame of the moving head and the target elliptical frame to disappear from view, respectively, upon determining that the elliptical frame of the moving head is aligned with the target elliptical frame; and obtaining, using said derived reference length, a measurement of a pupil distance of the user.