Patent ID: 11861805
Assignee: SONY GROUP CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A method, comprising:
in an electronic device:
acquiring a set of images comprising an eye of an object;
acquiring a three-dimensional (3D) mesh of a head portion of the object;
acquiring a 3D template mesh of an eyeball;
processing the acquired set of images to extract 3D feature points associated with a plurality of regions of the eye;
fitting a sphere to the extracted 3D feature points;
estimating an initial pose transformation between the 3D template mesh and the fitted sphere, wherein
the initial pose transformation includes estimation of a scale factor that corresponds to a ratio of a radius of the fitted sphere and a radius of the 3D template mesh, and
the scale factor represents a factor to scale and match a size of the 3D template mesh to a size of an eyeball socket of the 3D mesh of the object;

executing one or more operations by using the 3D template mesh, to interpolate a first set of points that correspond to the plurality of regions of the eye;
determining a second set of points which corresponds to the plurality of regions of the eye based on sampling parameters associated with the interpolated first set of points;
determining a final pose transformation based on a minimization of a difference between the first set of points and the second set of points; and
fitting the 3D template mesh into the eyeball socket of the 3D mesh, based on the determined final pose transformation and the estimated scale factor.