erosion and dilation in signal processing

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Annapoorani
Annapoorani 2012-2-4
评论： Image Analyst 2020-2-21
we need codes for erosion and dilation in signal processing...as imdilate and imerode functions can only be used in image processing..

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Image Analyst
Image Analyst 2012-2-4
They can be used for 1D signals, if you have the Image Processing Toolbox. Do you have that toolbox? If not, you might play around with this approach:
windowSize = 3;
originalSignal = rand(10,1)
hank = hankel(originalSignal)
h3 = hank(:,1:windowSize)
dilatedSignal = max(h3, [], 2)
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Image Analyst
Image Analyst 2020-2-21
You can still view the dilated image even though you get a warning that says it will shrink it down to fit onto the screen. You can safely ignore that warning. It's not serious. If you want to see it pixel for pixel, use the zoom tool to zoom in.

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shelley
shelley 2014-8-22
Yes, it is doable. It is better to binarize the signal first, and then use the command like
sel=strel('line',120,90);
%the length 120 depends on how big the gap you want to close/seal.
%the degree 90 or 0 depends on your 1D signal is in vector or row format;
results=imdilate(1Dsig,sel);

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