| Re: Image Classification with IDL [message #63593] |
Thu, 13 November 2008 13:40 |
Mort Canty
Messages: 134
Registered: March 2003
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Senior Member |
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gsever schrieb:
> I already guessed the answer to my questions should lie in some Image
> Processing books. Looking at some of the links on the Gonzalez's DIP
> book page I have found the tool titled CVIPTools (http://
> www.ee.siue.edu/CVIPtools/) might be worth to check.
Well, that's not exactly IDL, but it's free .-)
>
> I would appreciate if you provide those IDL routines, as well.
>
>
Sent you a mail.
-Mort
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| Re: Image Classification with IDL [message #63595 is a reply to message #63593] |
Thu, 13 November 2008 12:48  |
gsever
Messages: 28
Registered: August 2008
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Junior Member |
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I already guessed the answer to my questions should lie in some Image
Processing books. Looking at some of the links on the Gonzalez's DIP
book page I have found the tool titled CVIPTools (http://
www.ee.siue.edu/CVIPtools/) might be worth to check.
I would appreciate if you provide those IDL routines, as well.
On Nov 13, 12:26 pm, Mort Canty <m.ca...@fz-juelich.de> wrote:
>
> At the risk of telling you what you already know, looking at your
> examples it seems it might be good to use Hu's invariant moments (see
> e.g. Digital Image Processing, Gonzalez and Woods, 2002). They are
> translation- rotation- and scale-invariant and should discriminate
> spheres, needles, irregular shapes etc. Maybe use them to train a neural
> network? I've played around with them a bit and can give you an IDL
> function that calculates them.
>
> Cheers
>
> Mort
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| Re: Image Classification with IDL [message #63599 is a reply to message #63595] |
Thu, 13 November 2008 10:26 |
Mort Canty
Messages: 134
Registered: March 2003
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Senior Member |
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gsever schrieb:
> Hello,
>
> We are planning to design an IDL based program which will help us to
> classify cloud particles that are measured with 2DC Optical Array
> Probes.
>
> To illustrate more here is one example of raw 2DC image:
>
> http://img139.imageshack.us/my.php?image=2dcnf3.png
>
> We want to be able to categorize the particles as spheres, irregulars,
> needles and columns, and dendrites as it is shown on this Figure
> (http://ams.allenpress.com/perlserv/?request=display-
> figures&name=i1520-0426-17-8-1048-f01).
>
> There is a program implemented with Matlab (http://
> www.skytechresearch.com/feedback.htm) Since we have only IDL licensed
> here and that program is costly, we are going to focus on IDL.
>
> I would like to know whether IDL is suitable for this type of jobs?
> Any libraries exist like Matlab's Image Processing Toolbox?
>
> Any guidance or comments will be very appreciated.
At the risk of telling you what you already know, looking at your
examples it seems it might be good to use Hu's invariant moments (see
e.g. Digital Image Processing, Gonzalez and Woods, 2002). They are
translation- rotation- and scale-invariant and should discriminate
spheres, needles, irregular shapes etc. Maybe use them to train a neural
network? I've played around with them a bit and can give you an IDL
function that calculates them.
Cheers
Mort
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