Question

Image Shrinking has an undesirable feature, that is ____________

(a) Aliasing effect

(b) False contouring effect

(c) Ridging effect

(d) Checkerboard effect

This question was addressed to me in an international level competition.

This intriguing question comes from Zooming and Shrinking Digital Images topic in portion Image Enhancement of Digital Image Processing

Answer 1

Correct option is (a) Aliasing effect

To explain: Although Image Shrinking uses the grid analogy of nearest neighbor interpolation, but that we now expand the grid to fit over the original image, do gray-level nearest neighbor or bilinear interpolation, causing the possible aliasing effect, and then shrink the grid back to its original specified size.