Coordinate values of the markers arranged on the lower extremity of the experimental subject were recorded using an optical motion capture system. Reaction force from the outside was measured with a load board. A program was developed using Matlab to import the above data to quickly calculate the coordinates, displacement, velocity and acceleration of the barycenter in segments of the lower extremity. The joint angle, angular velocity, angular acceleration, joint force, torque and other motion parameters were also calculated. With existing analysis software, the processing methods were complicated and time consuming. This study aims to solve the problem. Using polynomial fitting, curves of various parameters are smoothed, and correctness of the algorithm is verified by comparing the processing results with those generated by Visual 3D software.
SHI Juan1, WANG De-yu1,2, TANG Gang1
. Algorithm for Processing Optically Captured Motion Data[J]. Journal of Shanghai University, 2014
, 20(4)
: 489
-497
.
DOI: 10.3969/j.issn.1007-2861.2014.01.023
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