The effect of spatial discretization on
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L.J. Kitchen; J.A. Malin
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Article
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1989
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Elsevier Science
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For a unit step edge, we calculate the gradient magnitude and direction reported by various simple differential edge operators as a function of the edge's actual orientation and offset with respect to the pixel grid. To be consistent with previous work (of Abdou and Prat 0 we have initially chosen t