Final code updates before demo video.  Tracks one keyed symbol boat
stored in the Train folder named shape1.jpg.  When a match occurs, the
centroids are show as large red circles, during which time smaller
purple circles using a Kalman filter (2x 2D points) are displayed.
Both the centroid points and the KF buffered points know which symbol is
which and a line is drawn from the left to the right which is show
by the square box(this is our arrow).  The original centroid reference
line is drawn attached to the left tracked KF point but whith its own
scale used which will be invariant in yellow