Recall vs. precision plot of the overall performance as a function of the dilation factor. Comparison between human annotation (HA), negative curvature maxima (NC), iterative voting initialized with NC (NCIV), tensor voting initialized with NC (NCTV), tensor voting (TV), and the Iterative Tensor Voting (ITV) are shown. ITV not only performs better than the other methods but also produces a 91% rate of agreement with HA in precision and 94% in recall.