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The Max Roberts Operator is a Hueckel-Type Edge Detector
January 1981 (vol. 3 no. 1)
pp. 101-103
Azriel Rosenfeld, Computer Science Center, University of Maryland, College Park, MD 20742.
Hueckel's edge detector finds the best-fitting ideal step edge to a given picture neighborhood by expanding the neighborhood and step edge in terms of a set of nine basis functions. A very simple case of this approach uses a 2 × 2 neighborhood and three basis functions. This case is solved explicitly using elementary methods. The magnitude of the best-fitting step edge for the neighborhood AB CD turns out to be the Roberts operator max (|A - D|, |B - C|).
Citation:
Azriel Rosenfeld, "The Max Roberts Operator is a Hueckel-Type Edge Detector," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 3, no. 1, pp. 101-103, Jan. 1981, doi:10.1109/TPAMI.1981.4767056
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