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公开(公告)号：US12142009B2
公开(公告)日：2024-11-12
申请号：US17838579
申请日：2022-06-13
Applicant: 3D Industrial Imaging Co., Ltd.
Inventor： Hyeonggyu Park , Kyunyun Kim
Abstract: A geometric calibration apparatus detects points from projection regions onto which markers disposed on a phantom are projected, and calculates an output vector representing a probability distribution that gives a probability with which each point is a projection of each marker, by inputting data corresponding to each point to a learning model. The geometric calibration apparatus extracts a predetermined number of samples based on the probability distribution, obtains a candidate projection matrix by transforming correspondences between markers determined based on the samples among the markers and points determined based on the samples among the points, calculates points into which the markers are transformed by the candidate projection matrix, calculates a difference between a set of the transformed points and a set of the detected points, and designates the candidate projection matrix as a projection matrix when the difference is less than or equal to a threshold.
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公开(公告)号：US20220405938A1
公开(公告)日：2022-12-22
申请号：US17838621
申请日：2022-06-13
Applicant: 3D Industrial Imaging Co., Ltd.
Inventor： Taehyung Kim , Haeyoung Joe , Kyunyun Kim
Abstract: The tooth segmentation apparatus detects a boundary box of each tooth from dental scan data in a form of a mesh, sets a boundary condition from the boundary box of each tooth, and segments a tooth region of each tooth in the dental scan data based on the boundary condition of each tooth.
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