'**SUMMARY**
Get each Pixel Velocity of the tracked object in pixel/second.
**PARAMETERS**
No Parameters required.
**RETURNS**
* *tuple* * - velocity tuple'

def __pixleVelocityRealTime(self):

    ts = self
    if (len(ts) < 2):
        return (0, 0)
    dx = (ts[(-1)].x - ts[(-2)].x)
    dy = (ts[(-1)].y - ts[(-2)].y)
    dt = (ts[(-1)].time - ts[(-2)].time)
    return ((float(dx) / dt), (float(dy) / dt))
