Title:
MOTION COMPENSATION IN A THREE DIMENSIONAL SCAN
Document Type and Number:
WIPO Patent Application WO/2014/068383
Kind Code:
A8
Abstract:
The present disclosure provides computing device implemented methods, computing device readable media, and systems for motion compensation in a three dimensional scan. Motion compensation can include receiving three-dimensional (3D) scans of a dentition, estimating a motion trajectory from one scan to another, and calculating a corrected scan by compensating for the motion trajectory. Estimating the motion trajectory can include one or more of: registering a scan to another scan and determining whether an amount of movement between the scans is within a registration threshold; determining an optical flow based on local motion between consecutive two-dimensional (2D) images taken during the scan, estimating and improving a motion trajectory of a point in the scan using the optical flow; and estimating an amount of motion of a 3D scanner during the scan as a rigid body transformation based on input from a position tracking device.
Inventors:
LEVIN ADI (IL)
Application Number:
PCT/IB2013/002396
Publication Date:
January 08, 2015
Filing Date:
October 25, 2013
Export Citation:
Assignee:
ALIGN TECHNOLOGY INC (US)
International Classes:
A61C9/00
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