US 12,360,404 B2
Geometrico-morphological parameter of a subject wearing an eyewear
Thierry Bonnin, Charenton-le-Pont (FR); and Alvin Francois, Charenton-le-Pont (FR)
Assigned to Essilor International, Charenton-le-Pont (FR)
Appl. No. 17/787,242
Filed by Essilor International, Charenton-le-Pont (FR)
PCT Filed Dec. 16, 2020, PCT No. PCT/EP2020/086538
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/122826, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19306711 (EP), filed on Dec. 19, 2019.
Prior Publication US 2023/0020160 A1, Jan. 19, 2023
Int. Cl. G02C 13/00 (2006.01); G06T 7/73 (2017.01); G06V 10/34 (2022.01); G06V 40/16 (2022.01)
CPC G02C 13/005 (2013.01) [G06T 7/74 (2017.01); G06V 10/34 (2022.01); G06V 40/161 (2022.01); G06V 40/171 (2022.01); G06T 2207/30201 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for determining a value of at least one geometrico-morphological parameter of a subject wearing an eyewear, said at least one geometrico-morphological parameter comprising either:
a parameter linked to both a head of the subject and said eyewear; or
a parameter linked only to the morphology of the subject; or
a parameter linked only to the geometry of the eyewear;
said method being computer implemented,
wherein the following steps are performed:
a) obtaining at least one image of the head of the subject wearing said eyewear;
b) identifying simultaneously, on said at least one image obtained in step a), a set of remarkable points of the image of the eyewear and a set of remarkable points of the image of the head of the subject, using an image processing algorithm determined based on a predetermined database comprising a plurality of reference images of heads wearing an eyewear, said image processing algorithm being based on machine learning; and
c) determining said at least one value of a geometrico-morphological parameter taking into account said sets of remarkable points of the image of the eyewear and head of the subject identified in step b).