Posted by
Brandon Hurr on
Jan 30, 2016; 3:53pm
URL: http://imagej.273.s1.nabble.com/Segmenting-touching-tubular-objects-tp5015488p5015491.html
I agree. Cut grooves in a small wooden plate in regular intervals and get
your pellets to sit in them. Take a photo and then your life is much
easier.
Something like this site offers should be available where you are. Or ask
around about a hacker/makerspace locally. They would likely cut something
for you for a fee. Paint it a reasonable "background" color and shake your
product over it to get things into the grooves. We've done this for similar
shaped objects at my work.
B
On Sat, Jan 30, 2016 at 2:20 AM, Gabriel Landini <
[hidden email]>
wrote:
> On Friday 29 Jan 2016 16:47:26 ecophysulm wrote:
> > I'd like to use ImageJ in an picture analysis for a in theory simple
> topic
> > which appears not so easy for me in practise.
> > I have photographs of small zylindric pellets and want to analyse them
> with
> > the Particle analyzer. Beside the issue that the picture carries some
> > reflections which I have more or less managed to get rid of. But the
> major
> > issue appears to be the segmentation: the objects to analyse are not
> > separated and are partly touching each other while having a elongated and
> > cylindric form.
>
> It will be difficult to separate 2 pellets side by side with the watershed
> separation. It is not made for that kind of problem.
>
> I see this as a problem that could be resolved outside the imaging part.
> What you want is to have the objects completely separated from each other
> from
> the start, so you do not have to separate them.
>
> I would use some kind of surface or tray where the pellets fall/slot in a
> preferred position and cannot overlap.
> I am thinking of some surface with grooves or undulations?
>
> Cheers
> Gabriel
>
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