Google is your friend:
http://en.wikipedia.org/wiki/Matched_filter
In article <1175842134.726079.232530@y66g2000hsf.googlegroups.com>,
"babyish_angel" <babyish_angel@yahoo.com> wrote:
>On Mar 19, 3:59 am, John_W_Her...@yahoo.com (John Herman) wrote:
>> In article <1171653397.871035.17...@v45g2000cwv.googlegroups.com>,
> sampson...@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.
>
>
>so john,what are u proposing?matched filter is it?ive nvr heard of it
>before
>
Reply by babyish_angel●April 6, 20072007-04-06
On Mar 19, 3:59 am, John_W_Her...@yahoo.com (John Herman) wrote:
> In article <1171653397.871035.17...@v45g2000cwv.googlegroups.com>, sampson...@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.
so john,what are u proposing?matched filter is it?ive nvr heard of it
before
Reply by John Herman●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.
>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
>=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 babyish_angel●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 Clay●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 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 Eric Jacobsen●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.
>
>Jerry
Wow, Jerry got hip.
;)
Eric Jacobsen
Minister of Algorithms
Abineau Communications
http://www.ericjacobsen.org
Reply by PARTICLEREDDY (STRAYDOG)●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=