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The goal of '''edge detection''' is to mark the points in an image at which the intensity changes sharply. Sharp changes in image properties usually reflect important events and changes in world properties. Edge detection is a research field within [[
== Edge properties ==
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Currently, the Canny operator is most commonly used, followed by Marr-Hildreth. Very many operators have been published but so far none have any significant advantage over the Canny operator in general situations. Work on multi-scale techniques is still very much in the labs.
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