Effacer les filtres
Effacer les filtres

How to remove noise from a plot?

7 vues (au cours des 30 derniers jours)
Sean
Sean le 24 Fév 2015
Commenté : Sean le 25 Fév 2015
I've created a function to detect white edges in an image. This plot is a segment in an image (post processing of my function). The example above has a lot of noise in it, as you can see the segment I'm trying to plot is quite consistent along the 220 mark (y axis) and the large peaks (mostly above) represent noise, there are a few below also. Is there a function or some sort of way I can remove these large peaks? the function works quite well for the majority of images I'm using, data such as above is one of an awkward bunch.

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Image Analyst
Image Analyst le 24 Fév 2015
You can make it a bit more robust, but how about just thresholding, then interpolate what's left with interp1
badElements = signal > 230 | signal < 215;
newY = y(~badElements);
newX = x(~badElements);
xq = x;
fixedY = interp1(newX, newY, xq);
It would have been better if you had attached your data so people could have tried things.
  5 commentaires
Sean
Sean le 25 Fév 2015
the image is greyscale so the plot is 2D also, thanks again for the help.
Sean
Sean le 25 Fév 2015
s 1024x1 8192 double

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