Title:
CALIBRATION SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO/2022/145595
Kind Code:
A1
Abstract:
A calibration system, according to one embodiment of the present invention, comprises: a single or a plurality of shape scan (camera) units for acquiring a subject's shape information (human joint information and a shape of an object having a specific shape) including color and/or three-dimensional depth information; a location information acquisition sensor unit for acquiring location information of a tag attached to the subject; a projection unit for scanning an image on a surface or multiple surfaces; a center point or feature point extraction unit for calculating (extracting) a center point or a feature point for a specific shape of the subject by using point cloud information or joint information of the subject standing on the ground; a plane calibration unit for generating an axial point by using the center point or the feature point of the subject calculated by the center point or feature point extraction unit, calculating a coordinate transformation matrix of a shape scan (camera) on the basis of a coordinate system comprising the axial point, and performing calibration; an index vector extraction unit for using a tool capable of indication, or a gaze direction and position of a fingertip of the subject, and generating a three-dimensional vector connecting same; a back-surface calibration unit for generating an axial point at an indicated position by using the three-dimensional vector extracted by the index vector extraction unit, calculating a coordinate transformation matrix of the camera on the basis of a coordinate system comprising the axial point, and performing calibration; and a calibration recorrection unit for matching the coordinate systems of the shape scan (camera) and the projection unit, acquiring a position and joint information of the subject on the matched coordinate system, and automatically detecting and correcting a change when a change occurs in a matched coordinate axis of a sensor.
Inventors:
KIM MUN SANG (KR)
LEE DEOK WON (KR)
LEE SANG HYUB (KR)
JUN KOOK SUNG (KR)
LEE DEOK WON (KR)
LEE SANG HYUB (KR)
JUN KOOK SUNG (KR)
Application Number:
PCT/KR2021/006882
Publication Date:
July 07, 2022
Filing Date:
June 02, 2021
Export Citation:
Assignee:
GWANGJU INST SCIENCE & TECH (KR)
International Classes:
G06T7/80; G06F3/041; G06T7/246; G06T7/70; H04W4/80
Foreign References:
| KR20160081788A | 2016-07-08 | |||
| KR20200092215A | 2020-08-03 | |||
| US20170154471A1 | 2017-06-01 | |||
| KR20190050551A | 2019-05-13 | |||
| KR20160031967A | 2016-03-23 |
Attorney, Agent or Firm:
MAJOR PATENT AND LAW FIRM (KR)
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