Issue No. 02 - March/April (1988 vol. 8)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/38.506
<p>A tracking algorithm is given for curves that have equations of the form f(x,y)=0. It produces the next approximating pixel by looking for a sign difference in function evaluations at midpoints between the eight nearest neighboring pixels. The search proceeds in order of decreasing likelihood, examining the most probable candidates first.</p>
R. E. Chandler, "A Tracking Algorithm for Implicitly Defined Curves," in IEEE Computer Graphics and Applications, vol. 8, no. , pp. 83-89, 1988.