Mixed Signature: An Invariant Descriptor for 3D Motion Trajectory Perception and Recognition

<table>Mirror symmetry trajectory with <svg height="11.6375" id="M36" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 18.200001 11.6375" width="18.200001" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.362)"><path d="M600 0h-557v24l268 633l28 8l261 -641v-24zM497 50l-194 489l-196 -489h390z" id="x394"></path></g><g transform="matrix(.017,-0,0,-.017,10.959,11.362)"><use xlink:href="#x1D45F"></use></g>
</svg> and <svg height="11.6375" id="M37" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 17.4 11.6375" width="17.4" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,11.362)"><use xlink:href="#x394"></use></g><g transform="matrix(.017,-0,0,-.017,10.959,11.362)"><use xlink:href="#x1D460"></use></g>
</svg> in corresponding segments. Arrows show the left-hand helix and right-hand helix.</table>

Mathematical Problems in Engineering

fig7

Figure 7

Figure 7: Mixed Signature: An Invariant Descriptor for 3D Motion Trajectory Perception and Recognition 