Re: size range in analyze particles?

Posted by Michael Schmid on Mar 19, 2015; 6:10pm
URL: http://imagej.273.s1.nabble.com/size-range-in-analyze-particles-tp5012060p5012064.html

Hi Rodrigo,

the maximum image size in ImageJ is 2^31-1 pixels = 2147483647 pixels (at least for ImageJ1)
So you can't have 30000000000.00 pixels.

If the area is in calibrated units (e.g. 30000000000 square micrometers, which is roughly 17 cm * 17 cm), the 'pixel' checkbox should be off, and the word 'pixel' should be removed from the macro command.  Calibration of such an image in millimeters might be more handy.

Michael
________________________________________________________________
On Mar 19, 2015, at 16:13, Rodrigo Gonçalves wrote:

> Dear all,
>
> I need to measure particles with area bigger than 250 px2 and smaller than I want to avoid particles bigger than 30 000 000 000 px2.
>
> So I analyze particles in the image:
> run("Analyze Particles...", "size=250.00-30000000000.00 pixel show=Outlines display clear summarize add");
>
> But in the Results window list I obtain one particle (#3) bigger than the set size(44493121880.74 px2), Also, when I select the “big” particle in the ROI and I press “measure”, I even get a different (but still bigger than desired) area: 53494241962.58 px2
>
>
>
> What  am  I  doing  wrong?
>
> Thanks, Rodrigo
> image:
> sample_th.tif
>
> ________________________
> Rodrigo J. Gonçalves
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