http://imagej.273.s1.nabble.com/problems-with-the-function-analyse-particles-tp4999891p4999902.html
active). I guess that's the reason why 'analyse particles' shows 100%
and 100% of that particle are above threshold.
> Hi Kathrin,
> hey, you got me surprised. The area fraction shows 100% for each
> particle also when I try it with the blob sample from the ImageJ file
> menu. It seems also to be dependent on the scaling set in 'Analyze>set
> scale...' . Maybe one of the programmers know why the area fraction is
> not expressed as fraction of the whole image which would be what I'd
> expect. For the time being a workaround for you is to get the total area
> of your frame from the image information or by selecting the whole image
> (ctl+a) and making a measurement (ctl+m). With this figure you can
> calculate each fraction of a particle in an excel or calc -table.
> By the way, have you noticed that the results menu in the results window
> can show you a histogram of the distribution in your measurements? Maybe
> that is also useful for you.
> Good luck
> Christian
>
> Kathrin Kolotzek wrote:
>> Hey Christian, Hey Larry
>>
>> thanks for your quick respons.
>>
>> We are having an alloy which is pressed out of grains. And depending
>> the parameters there are sometimes more and bigger pores and sometimes
>> not. So I want to determine the porosity depending the used parameters.
>> Furthermore I am interested in the percentage area of the particles
>> to sort them better out.
>>
>> Christian I think u mean something like this here: (I shortend it and
>> just listets area and %area) right?
>>
>> Area %area
>> 1 12 100
>> 2 12 100
>> 3 12 100
>> 4 446 100
>> 5 12 100
>>
>>
>> And here I was wondering why it always says 100% in %area, no matter
>> what size the particle has.
>> So do I have this right, in your opinion I should just take the values
>> which are presented in the gap "area" and calculate the %area on my own?
>>
>> Thanks in regard.
>> Kathrin
>>
>> --
>> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html>>
>
> --
> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html