Patent ID: 11930154
Assignee: ALIGN TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC A  H  G  Y | IPC G  H

Claim 13:
14. A non-transitory computer readable medium comprising instructions that, when executed by a processor, cause the processor to perform operations comprising:
receiving a series of images generated by one or more cameras of an intraoral scanner, each image including at least a portion of a pattern projected by one or more structured light projectors of the intraoral scanner onto an intraoral three-dimensional surface;
running a correspondence algorithm to compute respective three-dimensional positions of a plurality of features of the pattern on the intraoral three-dimensional surface, as captured in the series of images;
identifying the computed three-dimensional position of a detected feature of the pattern as corresponding to a particular projector ray r, in at least a subset of the series of images; and
tracking the particular projector ray r across the series of images.