IP Library › Granted Patent US 12682494
Granted Patent B2
US 12682494 · App. 18/619,866 · Granted Jul 14, 2026

Method for calibrating intraoral scanner

Inventors: Myoung Namgung (Anyang-si, KR); Min Soo Cho (Anyang-si, KR); Weon Joon Lee (Anyang-si, KR)
Assignee: Huvitz Co., Ltd.
G06T7/80A61B5/0088G06T7/0012G06T7/50G06V10/141G06V10/56G06T2207/30036
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12682494
App. No.
18/619,866
Granted
Jul 14, 2026
Kind
B2
Abstract

A method of calibrating an intraoral scanner includes irradiating light of a third color using a projector onto a first calibration plate having a background of a first color and patterns of a second color, which are arranged at predetermined intervals within the background; obtaining an image of the patterns with an increased contrast by photographing the first calibration plate with a camera; calibrating the camera by comparing the image of the patterns with actual positions of the patterns; irradiating the first calibration plate with a patterned light having a predetermined pattern of a fourth color using the projector; obtaining an image of a pattern formed by the patterned light of the projector by photographing the first calibration plate with the camera; and calibrating the projector by comparing the pattern image with a target irradiation position of a pattern irradiated by the projector.

Claims (8)

1 . A method of calibrating an intraoral scanner, comprising the steps of:

obtaining an image of patterns by photographing a calibration plate having a background and the patterns arranged at predetermined intervals within the background with a camera;

calibrating the camera by comparing the image of the patterns obtained by photographing with the camera with actual positions of the patterns formed on the calibration plate;

causing a pattern of a patterned light to be formed in an empty space between the patterns formed on the calibration plate by irradiating the calibration plate with the patterned light having a predetermined pattern by using a projector;

obtaining an image of the pattern formed by the patterned light of the projector by photographing the calibration plate with the pattern of the patterned light formed thereon with the camera; and

calibrating the projector by comparing the pattern image of the patterned light obtained by photographing with the camera with a target irradiation position of a pattern irradiated by the projector,

wherein the pattern of the patterned light irradiated by the projector does not overlap with the patterns formed on the calibration plate but is formed between the patterns formed on the calibration plate.

2 . The method of claim 1 , wherein the background and the patterns are formed on one side of the calibration plate, and no additional shapes other than the patterns are formed on the background.