http://imagej.273.s1.nabble.com/Connecting-Two-Nearby-Edges-tp5008141p5008148.html
grains of a similar orientation. I had to preform a rough edge detection
"edges". It is my hope that, if I am able to actually separate these two
Kenneth, I think you may be right. I have yet to find any plugins that are
adequate for my purposes. I most likely will have to write something myself
or approach my problem in a different way. Unfortunately I have little
> In my opinion, this problem is just on the other side of
> the classic dividing line between “image processing” and
> “scene analysis”. Almost always, “scene analysis” tends
> to be very domain dependent and requires significantly different
> data structures and processing than what is usually found
> in ImageJ stuff.
>
> When I need to do things like this, I make extensive use of
> custom plugins which create a symbolic representation of the
> features found by the image processing level…and then implement
> custom algorithms which hardly ever go back to look at the
> raw image (sometimes there is a “verification vision” step - but
> less often than you might think).
>
> So…I think the short answer is that you have gotten as far as you
> can with vanilla ImageJ - and now you need to write some custom
> programs, probably in Java. These can still run as ImageJ plugins,
> but they won’t look much like all the plugins you see in
> the typical ImageJ tutorial.
>
> Looking at your sample images, and your intended “correct answer”, I think
> you need to define WHY the blue segments are added, but not similar-looking
> (to my eye) extensions of other linear features in the image - say, for
> example,
> the short line at 4 o’clock from the small circular figure. These are the
> kinds of decisions which usually depend crucially on domain-specific
> knowledge,
> which makes it difficult to write a “general purpose” version of what you
> want.
>
> If you are lucky, someone will now pipe up and embarrass me by pointing out
> some existing ImageJ plugin that does precisely what you want. For your
> sake, I hope so.
>
> --
> Kenneth Sloan
>
[hidden email]
>
>
> On Jun 11, 2014, at 12:35 , James Male <
[hidden email]> wrote:
>
> > Hello,
> >
> > I am trying to measure two different particles of a very similar
> brightness
> > and have been attempting to do so by subtracting a canny edge detection
> > image from the original image in order to create a white barrier between
> > the two particles. However, the edge detected by the canny edge detector
> > does not completely split the two regions. Is there any program I can run
> > which will automatically connect nearby lines? For my purposes I cannot
> use
> > manual tools such as the pencil.
> >
> > I have attached an image of the region I am talking about (circled in
> red)
> > and an image of what I want the image to look like (drawn in blue).
> >
> > Thank you,
> > James
> >
> > --
> > ImageJ mailing list:
http://imagej.nih.gov/ij/list.html> > <help region.png><help connected.png>
>
> --
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http://imagej.nih.gov/ij/list.html>