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Frequency domain lowpass filtering on images (2-D domain)

version 1.0.0 (6.74 MB) by ABHILASH SINGH
We have discussed the three type of lowpass filters in the frequency domain. (Ideal, Butterworth and Gaussian LPF)

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Updated 10 Mar 2021

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We have presented the code for three types of lowpass filtering in the frequency domain;
1. Ideal lowpass filter (ILPF) (Problem?)
2. Butterworth lowpass filter (BLPF)
3. Gaussian lowpass filter (GLPF)

You can clearly observe the problem of the ringing effect in the output of the low pass filter.
Reason for ringing effect;
Convolution of any image (consisting of groups of impulses of
different strengths) with the ripple shaped function results in the
ringing phenomenon.

Cite As

ABHILASH SINGH (2021). Frequency domain lowpass filtering on images (2-D domain) (https://www.mathworks.com/matlabcentral/fileexchange/88597-frequency-domain-lowpass-filtering-on-images-2-d-domain), MATLAB Central File Exchange. Retrieved .

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MATLAB Release Compatibility
Created with R2020b
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Lowpass filtering in frequency domain