Thresholding in Canny edge detection algorithm

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mona
mona 2014-12-30
回答： Image Analyst 2014-12-30
Since Canny recommended a ratio of high:low threshold to be between 2:1 and 3:1. I am interested in knowing why is this range particularly selected? Does the answer lie within the understanding of how humans look at images? Any link or explanation would be much appreciated.

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Image Analyst
Image Analyst 2014-12-30
I would guess it's just a rule of thumb based on general experience - that's why it's such a wide range. You'll have to fine tune the number for your particular kind of images.

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