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In Image Processing, is it possible to automatically determine the upper and lower levels for a Hysteresis thresholding stage?. I have been looking for a while for a paper mentioning any technique for implementing this but I have not found it. Does anybody know any paper or document? Thank you.

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Canny's papers deal with that. More recent material can be found here:

http://www.researchgate.net/publication/222607779_On_candidates_selection_for_hysteresis_thresholds_in_edge_detection

Sandra Sandri

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