21. State for the validation of the statement:

“In general-purpose for a digital image of zooming and shrinking, where Bilinear Interpolation generally is the method of choice over nearest-neighbor Interpolation”.

A. True

B. False

22. A pixel p at coordinates (x, y) has neighbors whose coordinates are given by:

(x+1, y), (x-1, y), (x, y+1), (x, y-1)

This set of pixels is called ____________

A. 4-neighbors of p

B. Diagonal neighbors

C. 8-neighbors

D. None of the mentioned

23. A pixel p at coordinates (x, y) has neighbors whose coordinates are given by:

(x+1, y+1), (x+1, y-1), (x-1, y+1), (x-1, y-1)

This set of pixels is called ____________

A. 4-neighbors of p

B. Diagonal neighbors

C. 8-neighbors

D. None of the mentioned

24. What is the set of pixels of 8-neighbors of pixel p at coordinates (x, y)?

A. (x+1, y), (x-1, y), (x, y+1), (x, y-1), (x+2, y), (x-2, y), (x, y+2), (x, y-2)

B. (x+1, y), (x-1, y), (x, y+1), (x, y-1), (x+1, y+1), (x+1, y-1), (x-1, y+1), (x-1, y-1)

C. (x+1, y+1), (x+1, y-1), (x-1, y+1), (x-1, y-1), (x+2, y+2), (x+2, y-2), (x-2, y+2), (x-2, y-2)

D. (x+2, y), (x-2, y), (x, y+2), (x, y-2), (x+2, y+2), (x+2, y-2), (x-2, y+2), (x-2, y-2)

25. 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

26. Let S, a subset of pixels in an image, is said to be a connected set if:

A. If for any pixel p in S, the set of pixels that are connected to it in Sis only one

B. If it only has one connected component

C. If S is a region

D. All of Mentioned

27. 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 has 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 Mentioned

D. None of the mentioned

28. For pixels p(x, y), q(s, t), and z(v, w), D is a distance function or metric if:

A. D(p, q) ≥ 0

B. D(p, q) = D(q, p)

C. D(p, z) ≤ D(p, q) + D(q, z)

D. All of Mentioned

29. For pixels p(x, y), q(s, t), the Euclidean distance between p and q is defined as:

A. D(p, q) = [(x – s)2 + (y – t)2]1/2

B. D(p, q) = |x – s| + |y – t|

C. D(p, q) = max (|x – s| + |y – t|)

D. None of the mentioned

30. For pixels p(x, y), q(s, t), the city-block distance between p and q is defined as:

A. D(p, q) = [(x – s)2 + (y – t)2]1/2

B. D(p, q) = |x – s| + |y – t|

C. D(p, q) = max (|x – s| + |y – t|)

D. None of the mentioned