US 12,108,988 B2
System and method for measuring pupillary distance and uses thereof
Dee Celeste Goldberg, New York, NY (US); Benjamin Cohen, New York, NY (US); and Taylor Alexandra Duffy, Waldwick, NJ (US)
Assigned to Warby Parker Inc., New York, NY (US)
Filed by Warby Parker Inc., New York, NY (US)
Filed on Jun. 11, 2021, as Appl. No. 17/345,876.
Claims priority of provisional application 63/040,184, filed on Jun. 17, 2020.
Prior Publication US 2021/0393121 A1, Dec. 23, 2021
Int. Cl. A61B 3/11 (2006.01); G06T 17/20 (2006.01)
CPC A61B 3/11 (2013.01) [G06T 17/20 (2013.01); G06T 2210/41 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of operating a pupillary distance (“PD”) system, the method comprising the steps of:
capturing, with at least one camera of the pupillary distance system, a first 2D image and a corresponding 3D depth map of a face of a subject;
determining pupil localization information using the first 2D image and corresponding 3D depth map;
refining one or more pupil locations based on the pupil localization information using a convolution with one or more kernels and one or more 2D center-surround filters;
determining one or more pupil center coordinates; and
calculating the PD of the subject between centers of each pupil.