US 11,789,295 B2
Computer-implemented method for determining centration parameters
Claudia Nieuwenhuis, Aalen (DE); and Oliver Schwarz, Ellwangen (DE)
Assigned to Carl Zeiss Vision International GmbH, Aalen (DE); and Carl Zeiss AG, Oberkochen (DE)
Filed by Carl Zeiss Vision International GmbH, Aalen (DE); and Carl Zeiss AG, Oberkochen (DE)
Filed on Aug. 26, 2022, as Appl. No. 17/822,557.
Application 17/822,557 is a division of application No. 17/105,980, filed on Nov. 27, 2020, granted, now 11,480,816.
Application 17/105,980 is a continuation of application No. 16/519,562, filed on Jul. 23, 2019, abandoned.
Application 16/519,562 is a continuation of application No. PCT/EP2018/051841, filed on Jan. 25, 2018.
Claims priority of application No. 17153559 (EP), filed on Jan. 27, 2017.
Prior Publication US 2022/0404645 A1, Dec. 22, 2022
Int. Cl. G02C 13/00 (2006.01); G06T 7/50 (2017.01); G06T 7/00 (2017.01); G06T 7/70 (2017.01); G06T 7/60 (2017.01); H04N 23/56 (2023.01); H04N 23/90 (2023.01)
CPC G02C 13/005 (2013.01) [G06T 7/50 (2017.01); G06T 7/60 (2013.01); G06T 7/70 (2017.01); G06T 7/97 (2017.01); H04N 23/56 (2023.01); H04N 23/90 (2023.01); G06T 2207/30201 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A computer-implemented method for determining centration parameters, the method comprising:
providing at least two images of a head of a subject wearing a spectacle frame, the at least two images being calibrated to one another and recorded from different recording directions;
ascertaining geometric parameters describing a position of eyes of the subject from the at least two images by geometric position determination;
approximating a three-dimensional model for spectacle lenses to be received in a spectacle frame by at least one of planes or linear combinations of surfaces of n-th order;
providing geometric parameters describing a geometry of the spectacle frame;
fitting the least one of planes or linear combinations of surfaces of n-th order to the geometric parameters describing the geometry of the spectacle frame; and
calculating centration parameters from the geometric parameters describing the position of the eyes, the geometric parameters describing the geometry of the spectacle frame, and the geometric parameters describing the position of the at least one of planes or linear combinations of surfaces of n-th order.