hi everyone, does anyone of u knws how to remove noise in a graph?its kind of a new thing because normally we hear bout how to remove noise in an image. please let me knw if anyone of u knw.thnx.
noise removal
Started by ●February 16, 2007
Reply by ●February 16, 20072007-02-16
babyish_angel wrote:> hi everyone, > > does anyone of u knws how to remove noise in a graph?its kind of a new > thing because normally we hear bout how to remove noise in an image. > > please let me knw if anyone of u knw.thnx.Whea u at, huh? Try lopass filter, c if u like it. Jerry -- Engineering is the art of making what you want from things you can get. ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Reply by ●February 16, 20072007-02-16
yes,
i agree with jerry..try to use MA filter to remove out spikes
(noise) ..
by the way...can you tell the nature of the graph..i mean does it
follow any particular pattern or so...
wait..can anybody..tell..if i know..the nature..of the signal. i mean
to certain extent...i can use the wiener filter right..
regards
particlereddy
On Feb 16, 4:44 am, Jerry Avins <j...@ieee.org> wrote:
> babyish_angel wrote:
> > hi everyone,
>
> > does anyone of u knws how to remove noise in a graph?its kind of a new
> > thing because normally we hear bout how to remove noise in an image.
>
> > please let me knw if anyone of u knw.thnx.
>
> Whea u at, huh? Try lopass filter, c if u like it.
>
> Jerry
> --
> Engineering is the art of making what you want from things you can get.
> =AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=
=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=
=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF
Reply by ●February 16, 20072007-02-16
On Fri, 16 Feb 2007 07:44:40 -0500, Jerry Avins <jya@ieee.org> wrote:>babyish_angel wrote: >> hi everyone, >> >> does anyone of u knws how to remove noise in a graph?its kind of a new >> thing because normally we hear bout how to remove noise in an image. >> >> please let me knw if anyone of u knw.thnx. > >Whea u at, huh? Try lopass filter, c if u like it. > >JerryWow, Jerry got hip. ;) Eric Jacobsen Minister of Algorithms Abineau Communications http://www.ericjacobsen.org
Reply by ●February 16, 20072007-02-16
On Feb 16, 1:55 am, "babyish_angel" <babyish_an...@yahoo.com> wrote:> hi everyone, > > does anyone of u knws how to remove noise in a graph?its kind of a new > thing because normally we hear bout how to remove noise in an image. > > please let me knw if anyone of u knw.thnx.I don't know what you mean by "graph", but if it's a one-dimensional data series, simple tools at your disposal include: 1. Lowpass filter 2. Highpass filter 3. Median filter John
Reply by ●February 17, 20072007-02-17
On Feb 16, 1:55 am, "babyish_angel" <babyish_an...@yahoo.com> wrote:> hi everyone, > > does anyone of u knws how to remove noise in a graph?its kind of a new > thing because normally we hear bout how to remove noise in an image. > > please let me knw if anyone of u knw.thnx.Well removing noise in a graph is hardly new. I'm sure you did graphs in high school and you drew a best fit straight line through the data. That is a type of noise removal. If you want to do exactly that, then look up linear regression. If not, then you will need to elaborate a little more about what you really want and need. Clay
Reply by ●February 20, 20072007-02-20
On Feb 16, 8:44 pm, Jerry Avins <j...@ieee.org> wrote:> babyish_angel wrote: > > hi everyone, > > > does anyone of u knws how to remove noise in a graph?its kind of a new > > thing because normally we hear bout how to remove noise in an image. > > > please let me knw if anyone of u knw.thnx. > > Whea u at, huh? Try lopass filter, c if u like it. > > Jerry > -- > Engineering is the art of making what you want from things you can get. > =AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF==AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF= =AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF im from malaysia.currently in final year..doing my final year project in dis topis..i knw removin noise in graph is somethin new..n its kinda drive me crazy..anyway maybe i can do a research on methods tht u guys have mentioned.. jerry, the graph is like a seismograph,but not the one to measure earthquake,but to detect oil well (used in oil n gas industry)
Reply by ●February 20, 20072007-02-20
>On Feb 16, 8:44 pm, Jerry Avins <j...@ieee.org> wrote: >> babyish_angel wrote: >> > hi everyone, >> >> > does anyone of u knws how to remove noise in a graph?its kind of anew>> > thing because normally we hear bout how to remove noise in an image. >> >> > please let me knw if anyone of u knw.thnx. >> >> Whea u at, huh? Try lopass filter, c if u like it. >> >> Jerry >> -- >> Engineering is the art of making what you want from things you canget.>>=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=>=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF= >=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF=AF > >im from malaysia.currently in final year..doing my final year project >in dis topis..i knw removin noise in graph is somethin new..n its >kinda drive me crazy..anyway maybe i can do a research on methods tht >u guys have mentioned.. >jerry, the graph is like a seismograph,but not the one to measure >earthquake,but to detect oil well (used in oil n gas industry) > >If you think your oil well graph might be periodic you can even use autocorrelation to find out a few properties which would be difficult to see in a graph with noise.. like frequency..
Reply by ●February 20, 20072007-02-20
Here's some similar discussion http://groups.google.com/group/comp.dsp/browse_thread/thread/659e22218bd23d9c/22e0cdb0506ac390?hl=en#22e0cdb0506ac390
Reply by ●March 18, 20072007-03-18
In article <1171653397.871035.17150@v45g2000cwv.googlegroups.com>, sampson164@gmail.com wrote:>On Feb 16, 1:55 am, "babyish_angel" <babyish_an...@yahoo.com> wrote: >> hi everyone, >> >> does anyone of u knws how to remove noise in a graph?its kind of a new >> thing because normally we hear bout how to remove noise in an image. >> >> please let me knw if anyone of u knw.thnx. > > >I don't know what you mean by "graph", but if it's a one-dimensional >data series, simple tools at your disposal include: > >1. Lowpass filter >2. Highpass filter >3. Median filter > >John >Is wavelet denoising an option? I've seen papers on this subject though it always seemed like a fairy tale. If I know my signal waveform, I can use a matched filter in either the frequency domain or in the time domain. In seismic work, the high frequency components disappear quickly so a matched filter might be time varying.
