On edge gradient approximations

  • Authors:
  • J. Föglein

  • Affiliations:
  • SERC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 OQX, U.K.

  • Venue:
  • Pattern Recognition Letters
  • Year:
  • 1983

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Abstract

The effect of imposing some desirable properties on the masks of differential-type operators is studied. It is shown that in a 3x3 window there are only two free parameters to specify. It is also shown that under the assumption of these properties a widely used differential-type edge detection method is equivalent to an appropriate template-matching method and vice-versa.