[R] Image Processing packages

Thomas Kaliwe hamstersquats at web.de
Fri Jan 27 18:23:17 CET 2006


Is it possible that I could see some of your functions and/or results of
those functions(Eric, Charles, Stephan). It's more about that I'd like
to see what already has been accomplished and the way that was chosen
thus circumventing reinvention and getting an overview.



-----Ursprüngliche Nachricht-----
Von: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] Im Auftrag von Charles Annis,
Gesendet: Freitag, 27. Januar 2006 16:36
An: 'Kort, Eric'
Cc: r-help at stat.math.ethz.ch; Stephan.Matthiesen at ed.ac.uk
Betreff: Re: [R] Image Processing packages


I use R to quantify the efficacy of ultrasonic inspections of metal
components (e.g. looking for nonmetallic inclusions in forgings) and use
for image processing, but my methods have been rather a kluge.  I am
interested in your R functions, if you will make them available.
Unfortunately, making a package for CRAN is (in my opinion) WAY too hard
Windows, and I've given up, but I hope that you do not.  I second
Matthiesen's recent suggestion that you make your image processing
available to fellow R users, if not on CRAN, then perhaps as ascii files
from your website.


Charles Annis, P.E.

Charles.Annis at StatisticalEngineering.com
phone: 561-352-9699
eFax:  614-455-3265
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Kort, Eric
Sent: Thursday, January 26, 2006 2:39 PM
To: Thomas Kaliwe; r-help at stat.math.ethz.ch
Subject: Re: [R] Image Processing packages

Thomas Kaliwe wrote:
> Hi,
> I've been looking for Image Processing packages. Thresholding, Edge
> Filters, Dct, Segmentation, Restoration. I'm aware, that Octave,
> etc. would be a good address but then I'm missing the "statistical
> power"  of R. Does anybody know of packages, projects etc. Comments on
> wether the use of R for such matters is useful are welcome.

See also my package rtiff for reading tiff images.

I routinely do image analysis in R.  Yes, it is relatively slow compared
to dedicated solutions, but I like the smooth integration with the
associated statistical analysis and the ability to have a single script
that performs the image analysis and multiple files and subsequent
statistical analysis, and with modern computing equipment R is fast
enough for my purposes.  

I have a variety of standard image processing functions written in R,
but have yet to distribute them because most people choose not to
perform image analysis in R for the previously stated reasons.  

So in general I would agree that R is sub-optimal for image processing
(and this is certainly outside the realm of things R was intended to do
if I read the early mailing list archives correctly).  However, it can
be done and it might be desirable to do so from a work-flow perspective.


> Greetings
> Thomas Kaliwe
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