Subject: [interferometry] Digest Number 1848
From: interferometry@yahoogroups.com
Date: 9/15/2011, 2:05 AM
To: interferometry@yahoogroups.com

interferometry
interferometry

Messages In This Digest (3 Messages)

1a.
Re: PSI software? From: Michael Peck
1b.
Re: PSI software? From: Michael Peck
1c.
Re: PSI software? From: Ed
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Messages

1a.

Re: PSI software?

Posted by: "Michael Peck" mpeck1@ix.netcom.com   mikepeck5440

Wed Sep 14, 2011 9:32 am (PDT)



At 09:49 PM 9/13/2011, atmpob wrote:
>"D" never could figure out how to convert the code into C. Even
>with Steve Koehler's help. We sort of stalled trying to figure out
>the math behind on of R's functions that Mike uses. Then there
>didn't seem to be any demand and I also lost interest in PSI since I
>get what I need from what I already have.

Dale:

You're right, the demand hasn't really materialized, so why add the
capability? If you ever decide to though just ask if you need
technical assistance. I have to crack open my copy of "C for Dummies"
any time I do C programming, but I can probably explain what the R
code is doing well enough for Steve to translate.

>I wrote most of it originally when I was unemployed so I had lots of
>time. Now I'm employed.
>

Congratulations!

------
Michael Peck
mpeck1@ix.netcom.com
http://wildlife-pix.com

1b.

Re: PSI software?

Posted by: "Michael Peck" mpeck1@ix.netcom.com   mikepeck5440

Wed Sep 14, 2011 9:32 am (PDT)



At 04:05 PM 9/13/2011, vladimir galogaza wrote:

>Ed,
>
> >Are these random igrams; don't you need to know the phase or time
> relationship of the igrams?
>
>Another program ( PCA based) does not care about knowing the amount
>of phase shift.
>But I am not certain if phases can be random or consecutive. Michael should
>tell us.

They can be either. According to the "discovery" paper by Vargas et
al. phase shifts should be reasonably uniformly distributed over one
or more full cycles. If you're going to try to rely on random
misbehavior to generate phase shifts probably the best bet is to
collect massive amounts of data - dozens or hundreds of
individual frames and if necessary look for good subsets.

I would probably not recommend this for a production environment, but
it's neat when it works.

>
> >What's the program called and is it in Michael's folder?
>

All of my software is at <http://wildlife-pix.com/rpackages/>. The
readme needs updating (sorry), but it is here:
<http://wildlife-pix.com/rpackages/readme.htm>. The current software
version has an additional demo that can be run by typing

demo(pcaest, package="zernike", ask=FALSE)

at the command line.

Mike P.

------
Michael Peck
mpeck1@ix.netcom.com
http://wildlife-pix.com

1c.

Re: PSI software?

Posted by: "Ed" opticsed@gmail.com   opticsed

Wed Sep 14, 2011 10:24 am (PDT)



Thanks Vlad and Michael, I'll be trying to get through this.

Ed

--- In interferometry@yahoogroups.com, Michael Peck <mpeck1@...> wrote:
>
> At 04:05 PM 9/13/2011, vladimir galogaza wrote:
>
>
> >Ed,
> >
> > >Are these random igrams; don't you need to know the phase or time
> > relationship of the igrams?
> >
> >Another program ( PCA based) does not care about knowing the amount
> >of phase shift.
> >But I am not certain if phases can be random or consecutive. Michael should
> >tell us.
>
> They can be either. According to the "discovery" paper by Vargas et
> al. phase shifts should be reasonably uniformly distributed over one
> or more full cycles. If you're going to try to rely on random
> misbehavior to generate phase shifts probably the best bet is to
> collect massive amounts of data - dozens or hundreds of
> individual frames and if necessary look for good subsets.
>
> I would probably not recommend this for a production environment, but
> it's neat when it works.
>
> >
> > >What's the program called and is it in Michael's folder?
> >
>
> All of my software is at <http://wildlife-pix.com/rpackages/>. The
> readme needs updating (sorry), but it is here:
> <http://wildlife-pix.com/rpackages/readme.htm>. The current software
> version has an additional demo that can be run by typing
>
> demo(pcaest, package="zernike", ask=FALSE)
>
> at the command line.
>
> Mike P.
>
>
>
>
> ------
> Michael Peck
> mpeck1@...
> http://wildlife-pix.com
>

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