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Canny edge detector without thresholds

Hey everyone,

I am interesting in getting a edge map with some sort of probability embedded for the edges. This would result in something like this :

image description

The Canny edge detector in opencv seems to force thresholds though, resulting in a binary map. Is there something I can do to disable this? Or am I looking at implementing my 'own' Canny method which does not perform this step?

Best regards, Hans