MATLAB: Imagine processing, elimination of oscillations

image processing

Hi,

I need to follow only the max peacks of the figure shown. I want a figure without oscillations. How can I do?

Regards, Nello

Best Answer

You can use imdilate() which gives the max value inside a sliding window. Or just scan the data replacing with the max if it ever falls below the prior value.

out = inputSignal % Make copy.
for k = 2 : length(out)
  if out(k) < out(k-1)
    out(k) = out(k-1);
  end
end

Related Solutions

MATLAB: How to compare row values in a column

Here's one easy, straightforward way:

A=[2, 3, 4, 2, 2, 3, 7, 3, 3] % size 10x1 could be 10e5x1
% out is the sign of the difference
out = sign(diff(A))
% Fill in zeros with the last known good sign
for k = 2 : length(out)
  if out(k) == 0
    out(k) = out(k-1);
  end
end
% Print to command window
out

The only requirement is that you don't start off with one or more zeros because there is no prior sign to use for "out" in that case.

MATLAB: How to solve this in matlab

This solution relies on only one for-loop (although technically you could replace this for-loop, too). 'sumOut' is the solution to the equation.

kMax = 10;
out = zeros(1,kMax); 
for k = 1:kMax
    out(k) = sum(sin((pi + 0.1)./(1:k)) .* exp(-k/2)); 
end
sumOut = sum(out);

Best Answer

Related Solutions

MATLAB: How to compare row values in a column

MATLAB: How to solve this in matlab

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