Re: Isolating the background pixels from foreground pixels

Posted by Gabriel Landini on
URL: http://imagej.273.s1.nabble.com/Isolating-the-background-pixels-from-foreground-pixels-tp5003764p5004173.html

On Saturday 27 Jul 2013 02:47:33 you wrote:

> Dear Karsten,
>
> I am trying to measure the parameters of 100 particles in Image J and under
> "Analyze Particles", I also selected the "Summary option". My main problem
> now is that I deleted some of the particles as requested by my Professor
> from the list after the data was provided by Image J. This makes the
> "Summary" data not useful anymore as they do not reflect all the 100
> particles I started with originally. I measured all the parameters under
> "Set measurement" for each particle so now I need to produce a new summary
> data as the values would be used in plotting graphs. I have figured out how
> to Area which is just a simple addition of the areas of each particle.
> Other parameters that are in the summary that I cannot determine from the
> particles data are the following:

I would question the use of a summary, if you do not know what it means.
The best thing is to generate your own summary using the spreadsheet functions
(excel? SPSS? R?) to output distribution descriptor (means, sd, min, max,
etc.) that then I can use for a particular purpose.

For example, Feret angle cannot be just "averaged" to estimate an average
angle.
Feret X and Y are perhaps coordinates. What use is that?

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