I'm measuring angular movement of each finger joint in the human hand. I'm using three reflective markers across each finger joint to determine each joint angle. One marker is placed on top of the relevant joint, with one on either side of it. I'm currently measuring movement using the dot product of recorded data. I noticed however that there is an option when exporting the movement csv file to add kinematic values, but this does not produce angular measurement. Any suggestions?
I use a similar marker placement to measure finger angular motion in the hand, but use the motion analysis system and the cortex software. I don't have much experience with Nexus, but I know that with cortex I convert the mocap file to a c3D and export. I then calculate the angles of the markers using visual 3D software, using commands from the pipeline. You can also calculate in labview. You can probably customize a pipeline in vicon to produce the angular measurements. Cheryl Metcalf developed a marker placement system called HAWK that may be helpful to you as well. http://www.cherylmetcalf.co.uk/hawk.php
Here is the reference to her publication as well
Metcalf, C. D., Notley, S. V., Chappell, P. H., Burridge, J. H. & Yule, V. T., 2008. Validation and Application of a Computational Model for Wrist and Hand Movements using Surface Markers. IEEE Transactions on Biomedical Engineering. 55(3), 1199-1210.
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