Let R be a subset of pixels in an image. How can we define the contour

1.	Let R be a subset of pixels in an image. How can we define the contour of R?
A.	If R is a region, and the set of pixels in R have one or more neighbors that are not in R
B.	If R is an entire image, then the set of pixels in the first and last rows and columns of R
C.	All of the mentioned
D.	None of the mentioned
Answer» D. None of the mentioned

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Let R be a subset of pixels in an image. How can we define the contour of R?

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