Question

What is/are the resultant image of a smoothing filter?

(a) Image with high sharp transitions in gray levels

(b) Image with reduced sharp transitions in gray levels

(c) All of the mentioned

(d) None of the mentioned

The question was posed to me in an international level competition.

My enquiry is from Smoothing Linear Spatial Filters topic in portion Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

Right answer is (b) Image with reduced sharp transitions in gray levels

For explanation I would say: Random noise has sharp transitions in gray levels and smoothing filters does noise reduction.