The Threshold will be set up, including the High value of threshold values 2 (T1), and Low threshold (T2), which is pixel 1 is assigned T contains the value is 1, which is pixel image, but if a margin is less than T2 is configured as 0 values between the two Threshold will be adjusted to a value of 1 or 0, depending on the surrounding pixels are. Finding the edge by this method produces a thick edge and edge, which makes finding the edge, good results.
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