problem using medfilt2

Question

Harald von der Osten 2020-2-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/504605-problem-using-medfilt2

评论： Harald von der Osten 2020-2-10

采纳的回答： Subhadeep Koley

cond2a.csv

在 MATLAB Online 中打开

Attached you can find the data. Please rename .csv to .dat, and just use:

load cond2a.dat   
Ax=cond2a(:,1);    
Ay=cond2a(:,2);    
Az=cond2a(:,3);    
Znew=medfilt2(Az);

The file contains xyz with z values around 169. But using medfilt2 at the four corners the data is 0. How can I prevend this?

Thanks a lot,

Harry

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Answer 1

Subhadeep Koley 2020-2-10

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/504605-problem-using-medfilt2#answer_414803

在 MATLAB Online 中打开

Your Az vector is mainly concentrated around 169, therefore normal median filtering destroys the sudden peaks. Using Padding option as 'symmetric' might help. Refer the code below.

load cond2a.dat   
Ax = cond2a(:, 1);    
Ay = cond2a(:, 2);    
Az = cond2a(:, 3);    
Znew = medfilt2(Az, 'symmetric'); 
figure;  plot(Az);
hold on;
plot(Znew);
legend({'Original Data', 'Median filtered data'});