Hi Jason,
you will mainly need smoothing algorithms.
Here is what I tried:
//elimiate horizontal lines
run("Convolve...", "text1=1\n2\n1\n normalize");
//then eliminate outliers
run("Median...", "radius=4.5");
//the following needs the "Thresholded Blur" edge-preserving plugin from
//
http://imagejdocu.tudor.lu/imagej-documentation-wiki/plugins/
thresholded-blur
run("Thresholded Blur", "radius=5 threshold=50 softness=0.50
strength=1");
//If you want, you may choose to increse the strength of the bars of
the "V":
run("Unsharp Mask...", "radius=10 mask=0.3");
Then you can try thresholding.
You can easily eliminate the remaining small blobs based on
their size (use "Analyze particles").
Hope this helps,
Michael
________________________________________________________________
On 21 Jul 2008, at 11:07, Ke Jiang wrote:
> Hello all,
>
> I'm new to ImageJ and hope that someone can give me some advice on
> what I am doing. I'm trying to highlight the cone structure in the
> superposed picture from different frames. One is able to identify
> the 'V' structure via naked eyes. However after testing different
> threshold, I am still not able to obtain a clear cone structure.
>
> The sample picture is downloadable via googlepages : http://
> dustyplasma.googlepages.com/cone.tif
>
> Thanks very much for your help in advance.
>
> Jayson
> --
> Ke Jiang (Jayson)
> Max-Planck-Institute for Extraterrestrial Physics,
> Giessenbachstrasse 1
> 85748 Garching, Germany
> Phone: +49 89 30000 3011(O)
> Fax: +49 89 30000 3950
> Email: jiang.at.mpe.mpg.de
> Homepage:
http://dustyplasma.googlepages.com/
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