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Re: Measurement hierarchy

Posted by karo03 on Dec 02, 2008; 1:50pm
URL: http://imagej.273.s1.nabble.com/Measurement-hierarchy-tp3694349p3694351.html

Thank you Gabriel,
I have still to learn result table handling and arrays!
However, your hints have helped me to avoid the second measure step  
with the labeled image. With the starting point I can extract the  
object number of both using the label image from your particle4/8  
routine and loo ... Of course region and particle intersect.

Karsten

Am 02.12.2008 um 12:16 schrieb Gabriel Landini:

> On Tuesday 02 December 2008 10:28:50 Karsten Rodenacker wrote:
>> See image http://picasaweb.google.com/lh/photo/ 
>> CebTTCSWQsR5LjUzN9BRPg;
>> I would like to measure several parameters like area, mean density,
>> variation etc. for each region and for each small particle. As the
>> region image is (in this case) an exo-skelteton derived from the
>> particles, each region has a related particle.
>>
>> Unluckily "Analyse particle" numbers each measurement different. To
>> preserve the relationship I have to measure the regions and the
>> particles both additionally with the label image to get a common  
>> label.
>
> Hi Karsten,
> You could try creating a results table that stores both, the start  
> points of
> the tiny particles and the starting points of the particle they  
> belong to at
> the same time (in different columns), so you can index the particles
> according to the parent partice/partition.
>
> To do this, you could: first extract the start points of the little  
> particles
> in the nucleus (binary image on the right), then one by one,  
> reconstruct the
> partitioned nucleus image (image on the top) based on the start  
> points of the
> small particles as seed. This will reconstruct a parent particle at  
> a time
> and now you can  extract its XStart YStart coordinates.
>
> So now you have both the tiny particle start point and the parent  
> particle
> start point and can identify which one is inside which one.
> Of course one has to store the tiny particles' starting points in an  
> array as
> the 2nd extraction might overwrite the table.
>
> I hope it is clear.
> Regards,
>
> Gabriel