Re: [R] Image Processing packages

From: Thomas Kaliwe <hamstersquats_at_web.de>
Date: Sat 28 Jan 2006 - 04:23:17 EST


Hi,

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.

Cheers

Thomas

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

Eric:

I use R to quantify the efficacy of ultrasonic inspections of metal components (e.g. looking for nonmetallic inclusions in forgings) and use R
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 on
Windows, and I've given up, but I hope that you do not. I second Stephan
Matthiesen's recent suggestion that you make your image processing functions
available to fellow R users, if not on CRAN, then perhaps as ascii files from your website.

Thanks.

Charles Annis, P.E.

Charles.Annis@StatisticalEngineering.com phone: 561-352-9699
eFax: 614-455-3265
http://www.StatisticalEngineering.com  

-----Original Message-----
From: r-help-bounces@stat.math.ethz.ch
[mailto:r-help-bounces@stat.math.ethz.ch] On Behalf Of Kort, Eric Sent: Thursday, January 26, 2006 2:39 PM To: Thomas Kaliwe; r-help@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,
Matlab
> 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.

-Eric

> Greetings
>
> Thomas Kaliwe

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