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While Zooming, In order to perform gray-level assignment for any point in the overlay, we assign its gray level to the new pixel in the grid its closest pixel in the original image. What’s this method of gray-level assignment called?

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While Zooming, In order to perform gray-level assignment for any point in the overlay, we assign its gray level to the new pixel in the grid its closest pixel in the original image. What’s this method of gray-level assignment called?

(a) Neighbor Duplication

(b) Duplication

(c) Nearest neighbor Interpolation

(d) None of the mentioned

I have been asked this question during an internship interview.

Query is from Zooming and Shrinking Digital Images in section Image Enhancement of Digital Image Processing

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Correct choice is (c) Nearest neighbor Interpolation

Explanation: Because we look for the closest pixel in the original image and assign its gray level to the new pixel in the grid.

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