Inter particle distance

[mkbh10]

From aerial density of particles in an image having random shapes and distribution , is there a way to calculate average inter particle distance ?

[Ed Simmons]

On 28/10/13 15:50, mkbh10 wrote:
> From aerial density of particles in an image having random shapes and
> distribution , is there a way to calculate average inter particle distance ?
>
>
>
Hi,

I don't know if you mean just neighbouring particles, or for the whole
set, but it is simple to obtain the locations of your particles if you
can threshold the image to leave just the particles shown. Using find
particles on the thresholded image (with Centroid enabled in the Set
Measurements dialog) will give you the list of particles and the
centroid for each particle. Then you can use this list to perform your
computations of inter particle distance.

You may wish to do some nearest-neighbour search to decide which
particles to compute distances between.

Experiment with the macro recorder and using GUI commands to get an idea
of the steps you'd want to perform, then you can edit the resulting
macro to suit your needs better.

Hope that helps,
Ed

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html

[carlo bianco]

hi
why don't you try with connectivity plugin?
Moreover you can quantify the fractality of dispersion of particles.
Best wishes
carlo





Il Lunedì 28 Ottobre 2013 21:36, Ed Simmons <[hidden email]> ha scritto:
 
On 28/10/13 15:50, mkbh10 wrote:
> From aerial density of particles in an image having random shapes and
> distribution , is there a way to calculate average inter particle distance ?
>
>
>
Hi,

I don't know if you mean just neighbouring particles, or for the whole
set, but it is simple to obtain the locations of your particles if you
can threshold the image to leave just the particles shown. Using find
particles on the thresholded image (with Centroid enabled in the Set
Measurements dialog) will give you the list of particles and the
centroid for each particle. Then you can use this list to perform your
computations of inter particle distance.

You may wish to do some nearest-neighbour search to decide which
particles to compute distances between.

Experiment with the macro recorder and using GUI commands to get an idea
of the steps you'd want to perform, then you can edit the resulting
macro to suit your needs better.

Hope that helps,
Ed

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html