Question

How aliasing does corrupts the sampled image?

(a) By introducing additional frequency components to the sampled function

(b) By removing some frequency components from the sampled function

(c) All of the mentioned

(d) None of the mentioned

This question was addressed to me during an interview for a job.

This interesting question is from Spatial and Gray-Level Resolution and Aliasing in section Image Enhancement of Digital Image Processing

Answer 1

The correct answer is (a) By introducing additional frequency components to the sampled function

For explanation: Aliasing corrupts the sampled image by introducing additional frequency components into the sampled function. These added components are called aliased frequencies.