Butterworth lowpass filter has a parameter, filter order, determining its functionality as very sharp or very smooth filter function or an intermediate filter function. If the parameter value is very high, the filter approaches to which of the following filter(s)?

asked Oct 7, 2021 in Digital Image Processing by Ananya (701k points)

Butterworth lowpass filter has a parameter, filter order, determining its functionality as very sharp or very smooth filter function or an intermediate filter function. If the parameter value is very high, the filter approaches to which of the following filter(s)?

(a) Ideal lowpass filter

(b) Gaussian lowpass filter

(c) All of the mentioned

(d) None of the mentioned

This question was posed to me during an online interview.

The question is from Smoothing Frequency-Domain Filters topic in section Intensity Transformations and Spatial Filtering of Digital Image Processing

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Butterworth lowpass filter has a parameter, filter order, determining its functionality as very sharp or very smooth filter function or an intermediate filter function. If the parameter value is very high, the filter approaches to which of the following filter(s)?

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