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Two pixels p and q having gray values from V, the set of gray-level values used to define adjacency, are m-adjacent if:

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Two pixels p and q having gray values from V, the set of gray-level values used to define adjacency, are m-adjacent if:

(a) q is in N4(p)

(b) q is in ND(p) and the set N4(p) ∩ N4(q) has no pixels whose values are from V

(c) Any of the mentioned

(d) None of the mentioned

This question was posed to me in unit test.

My enquiry is from Relationship between Pixels and Image Enhancement Basics topic in chapter Image Enhancement of Digital Image Processing

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The correct option is (c) Any of the mentioned

The explanation: Mixed adjacency is a modified form of 8-adjacency.

The above conditioned Two pixels p and q are m-adjacent if:

q is in N4(p), or

q is in ND(p) and the set N4(p) ∩ N4(q) has no pixels whose values are from V.

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