Motion compensation in a three dimensional scan

Patent metadata

Field	Value
Publication number	US-9214014-B2
Application number	US-201414578233-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	Nov 1, 2012
Publication date	Dec 15, 2015
Grant date	Dec 15, 2015

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.

First claim

What is claimed is:

1. A non-transitory computing device readable medium having instructions that can be executed by a processor to cause a computing device to:
receive a plurality of three-dimensional (3D) scans of a dentition;
register a distorted one of the plurality of scans to at least one of a previous scan and a subsequent scan;
determine whether an amount of movement between the distorted scan and at least one of the previous scan and the subsequent scan is within a r…

Assignees

• Align Technology Inc

Inventors

• Levin Adi

Classifications

• G06T2207/20048

  Physics · mapped topic

• A61C9/0053

  Human Necessities · mapped topic

• A61B1/24

  Human Necessities · mapped topic

• G06T2207/30241

  Physics · mapped topic

• G06T2207/30036

  Physics · mapped topic