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A special case of nearest neighbor Interpolation that just duplicates the pixels the number of times to achieve the desired size, is known as ___________

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A special case of nearest neighbor Interpolation that just duplicates the pixels the number of times to achieve the desired size, is known as ___________

(a) Bilinear Interpolation

(b) Contouring

(c) Ridging

(d) Pixel Replication

I have been asked this question in unit test.

I'm obligated to ask this question of Zooming and Shrinking Digital Images topic in portion Image Enhancement of Digital Image Processing

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Right option is (d) Pixel Replication

Best explanation: A special case of nearest neighbor interpolation is Pixel replication and is applicable when we want to increase the size of an image an integer number of times.

For example, doubling the size of an image is achieved duplicating each column and hence image size gets doubled in the horizontal direction. Then, we duplicate each row of the enlarged image to double the size in the vertical direction. Similarly, enlarging the image by any integer number of times (triple, quadruple, and so on) is possible.

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