I have read in the docs for the 'edge' function that when a low and high threshold are not defined when calling the 'canny' edge operator, MATLAB automatically determines the best values for the given image. The threshold values can be obtained by specifying outputs to the argument. But can anyone explain (simply, if possible) how MATLAB calculates these threshold values, and whether the process can be slightly adjusted to bias toward only the stronger edges being identified?
I know the doc files hint at how this is done, but I don't quite understand it...
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