Posted by
ayubsulong on
URL: http://imagej.273.s1.nabble.com/Thickness-plugin-3D-mapping-tp5009029p5009222.html
Dear Michael,
Sorry for not cc:ing to BoneJ mailing list, doing it now.
I need a bit more explanation on this 'All of the non-zero values in the
thickness map are used to calculate the standard deviation.'
Imagine a thin strut within a sample, is the thickness of the strut is
calculated on every pixel? Or does the calculation of the thickness
considered a certain spacing to avoid *too many* points. That is my
original meaning of my question 'How many points are taken...'
I need this to put them in methodology for a clear explanation in the
manuscript. Basically, I need to explain the mechanics behind the strut
measurement in the plugin.
Thanks in advance.
Ayub
On Thursday, August 14, 2014 9:28:38 PM UTC+10, Doube, Michael wrote:
>
> Dear Ayub
>
> Cc:ing BoneJ list as well.
>
> > I have a question on how standard deviation of the strut thickness was
> > calculated in 'thickness' command in BoneJ. How many points are taken
> into
> > account for calculating the standard deviation represented in the table?
>
> All of the non-zero values in the thickness map are used to calculate the
> standard deviation.
>
> If you selected 'Use ROI Manager' and the ROI Manager is populated with
> ROIs, the thickness map will contain only pixels from inside the ROIs. You
> could, in theory, calculate the standard deviation from any subset of
> pixels of the thickness map.
>
> Michael
>
>
> <
http://www.rvc.ac.uk>
>
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>
>
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