Patent ID: 11918424
Assignee: BEYEONICS SURGICAL LTD.
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 11:
12. A method for filtering a set of feature pairs between two images, the two images are of a patient, the method comprising:
receiving, by a computing device, a set of feature pairs wherein each feature pair comprises one feature location from a first image and a matching feature location from a second image; and
filtering, by the computing device, the set of feature pairs based on at least one of a scale invariant and a rotational invariant geometrical relationship between feature locations from the set of feature pairs,, the filtering further comprises:
selecting at least three feature pairs from the set of feature pairs,
determining, via the computing device, a first polygon with respect to the first image, such that the vertexes of the first polygon are the feature locations of the at least three feature pairs that are from the first image,
determining, via the computing device, a second polygon with respect to the second image, such that the vertexes of the second polygon are the feature locations of the at least three feature pairs that are from the second image,
determining via the computing device, whether the first and second polygons are similar, and
when the two polygons are not similar, discarding from the set of feature pairs at least one feature pair of the at least three feature pairs,
wherein the two images are selected from at least one of: a preoperative image and an intraoperative image of the patient.