MATLAB Answers

Median (Median) Filter Matlab

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ibrahim pangiz
ibrahim pangiz on 14 Jun 2020
Edited: KALYAN ACHARJYA on 14 Jun 2020
How to write a function of size 3x3 in Matlab without using Matlab's own ready function for the median (median) filter

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Answers (1)

KALYAN ACHARJYA
KALYAN ACHARJYA on 14 Jun 2020
Edited: KALYAN ACHARJYA on 14 Jun 2020
disp('##Input Data')
a=randi([1,10],[4,5]) %Any random data
%% # Using MATLAB Function medfilt2
disp('##Using MATLAB Median inbuilt function');
result_MATLAB=medfilt2(a)
%% # Own Custom Function
disp('##Own Median function');
[r c]=size(a);
a_paded=zeros(size(a)+2);
a_paded(2:end-1,2:end-1)=a;
for i=2:r+1
for j=2:c+1
data=a_paded(i-1:i+1,j-1:j+1);
data=sort(data(:));
result_own(i-1,j-1)=data(round(length(data)/2));
end
end
result_own
%You can avoid loop in later section,please see alternate way
Result:
##Input Data
a =
5 3 5 4 8
10 5 3 8 5
4 1 1 2 5
8 1 8 1 3
##Using MATLAB Median inbuilt function
result_MATLAB =
0 3 3 4 0
3 4 3 5 4
1 4 2 3 2
0 1 1 1 0
##Own Median function
result_own =
0 3 3 4 0
3 4 3 5 4
1 4 2 3 2
0 1 1 1 0

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