1. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Sketch of brace with xsens unit. The brace was designed so that it could be strapped to the subject’s arm in order to compare acceleration signals that were typical of those observed during human reaching movements. The rigidity of the brace ensured that the relative pose between the RCF and VCF remained constant at all times.

2. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Sketch illustrating experimental setup without the rigid brace. Clusters are labeled as elbow, C1, C2, and wrist

3. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Average error versus cut-off frequency when comparing all three pairs of signals. The nominal cut-off frequency of fc=6 Hz is shown as a vertical dotted line.

4. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Error versus angular offset for an algorithm trained at a given location

5. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Overview of the virtual sensor concept. A RCF is tracked using stereophotogrammetry (indirectly, via a rigid cluster of markers); its dynamics are then transformed to a VCF.

6. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Definition of the marker coordinate frame MCF based on positions of four markers, M1, M2, M3, and M4

7. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Definition of the RCF when based on positions of four anatomical markers, R1, R2, R3, and R4

8. Date of download: 10/8/2017
Copyright © ASME. All rights reserved.
From: Simulating Acceleration From Stereophotogrammetry For Medical Device Design
J Biomech Eng. 2009;131(6): doi: /
Figure Legend:
Frustum of cone used to model forearm. The distance between markers on the elbow specified the radius of the cone at the elbow, re. The radius at the wrist, rw, was defined similarly using wrist markers. The distance between the center of the elbow (midpoint of elbow markers) and the center of the wrist (midpoint of wrist markers) defined the length of the cone, L. The position and orientation of the VCF were then defined by these parameters plus two user-defined variables, l and θ.