Question

What is the relation between blurring effect with change in filter size?

(a) Blurring increases with decrease of the size of filter size

(b) Blurring decrease with decrease of the size of filter size

(c) Blurring decrease with increase of the size of filter size

(d) Blurring increases with increase of the size of filter size

The question was posed to me in an interview for internship.

This is a very interesting question from Smoothing Linear Spatial Filters topic in section Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

Correct answer is (d) Blurring increases with increase of the size of filter size

Explanation: Using a size 3 filter 3*3 and 5*5 size squares and other objects shows a significant blurring with respect to object of larger size.

The blurring gets more pronounced while using filter size 5, 9 and so on.