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Thread Subject: Filtering repititive signals

Subject: Filtering repititive signals

From: Torvald Helmer

Date: 30 Apr, 2008 14:28:02

Message: 1 of 1

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Hi all,

I have signal representing the center of mass for an
object, for each frame, during a video sequence.

Due to bad segmentation the object split at some point
during the sequence, and this happens to times.

This result in the signal giving first a peak at frame n,
at frame n+1 the signal drops the equal amount it peaked at
frame n. Frame n+2 is normal (as I want). Frame n+3 the
signal peak again, and at frame n+4 the signal drop.

So the there is a symmetry between the first peak and the
second peak, and the first drop and the second drop.

How can I filter these signal out? I know when a signal
only peaks at a single frame, and disappear at the next,
this is something that I want to be filtered. E.g. at frame
n the signal has value 100 and at frame n+1 the value
is -100. Frame n+2 is normal. Frame n+3 has value of 150
and frame n+4 has value of -150.

Can anyone help me here?

Thanks, Helmer

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Tag	Applied By	Date/Time
filtering	Torvald Helmer	30 Apr, 2008 10:30:06
signals	Torvald Helmer	30 Apr, 2008 10:30:06
plots	Torvald Helmer	30 Apr, 2008 10:30:06
symmetric	Torvald Helmer	30 Apr, 2008 10:30:06

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