Geometric calibration method and apparatus of computer tomography

    公开(公告)号:US12142009B2

    公开(公告)日:2024-11-12

    申请号:US17838579

    申请日:2022-06-13

    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.

    APPARATUS AND METHOD FOR MEASURING SURFACE OF ELECTRONIC DEVICE

    公开(公告)号:US20210190684A1

    公开(公告)日:2021-06-24

    申请号:US17251037

    申请日:2019-05-29

    Abstract: Various embodiments of the present invention relate to an apparatus and method for measuring the surface of an electronic device, the apparatus comprising: a seating portion on which the electronic device is seated; a first light source for irradiating first light on the surface of the electronic device; a first camera for photographing the surface using the first light; a second light source for irradiating second light on the surface of the electronic device; a second camera for photographing the surface using the second light; and an analyzer electronically connected to the first light source, the first camera, the second light source, and the second camera, wherein the analyzer is setup to analyze the color of the surface acquired using the first light source and the first camera; and the gloss of the surface acquired using the second light source and the second camera, so as to analyze the color and gloss of the surface of the electronic device using quantified and digitized data, thereby enabling quality inspection of the surface of the electronic device without deviation. Various other embodiments are possible.

    GEOMETRIC CALIBRATION METHOD AND APPARATUS OF COMPUTER TOMOGRAPHY

    公开(公告)号:US20220405970A1

    公开(公告)日:2022-12-22

    申请号:US17838579

    申请日:2022-06-13

    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.

    Apparatus and method for measuring surface of electronic device

    公开(公告)号:US11493442B2

    公开(公告)日:2022-11-08

    申请号:US17251037

    申请日:2019-05-29

    Abstract: Various embodiments of the present invention relate to an apparatus and method for measuring the surface of an electronic device, the apparatus comprising: a seating portion on which the electronic device is seated; a first light source for irradiating first light on the surface of the electronic device; a first camera for photographing the surface using the first light; a second light source for irradiating second light on the surface of the electronic device; a second camera for photographing the surface using the second light; and an analyzer electronically connected to the first light source, the first camera, the second light source, and the second camera, wherein the analyzer is setup to analyze the color of the surface acquired using the first light source and the first camera; and the gloss of the surface acquired using the second light source and the second camera, so as to analyze the color and gloss of the surface of the electronic device using quantified and digitized data, thereby enabling quality inspection of the surface of the electronic device without deviation. Various other embodiments are possible.

    TOOTH SEPARATION SYSTEMS AND METHODS

    公开(公告)号:US20210205057A1

    公开(公告)日:2021-07-08

    申请号:US17270091

    申请日:2019-08-23

    Inventor: Seung Ki KIM

    Abstract: A tooth separation system comprising: a loading unit for loading an intraoral scan data; a display unit for displaying the intraoral scan data loaded by the loading unit, in which the intraoral scan data includes a tooth as well as gums; an input unit for making a tooth border mark onto the tooth shown on the display unit; and a calculation unit for performing necessary calculations to separate the tooth from the gums based on the tooth border mark and the method using the same.

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