Posted by
Václav Šmilauer on
Mar 27, 2016; 6:14pm
URL: http://imagej.273.s1.nabble.com/Getting-started-with-grain-size-analysis-tp5016013.html
Hi everybody,
I am new to the list and have close to no experience with ImageJ (or
image analysis) but have a solid background in physics and programming.
I am facing the task of determining grain size distribution in photos
from industrial camera. A typical image is like this:
http://i.imgur.com/lwuOBeh.jpg (the diagonal separates two types of
material which has different reflecitivity). The eventual goal is an
unattended analysis under controlled conditions (same lighting,
resolution etc). I have some issues getting a reasonable result with
ImageJ and I would appreciate some help on how to move forward. Could
someone suggest a way I could try?
1. As far as I understood, simple methods like water-shedding are not
suitable since particles overlap each other, foreground/background
distinction makes only little sense (there is no threshold to say what
is what)?
2. The image has a lighter region in the middle (that's lighting
artifact), is there some function (filter) to even out the luminosity
over the area of the image?
3. I tried the graph-cut segmentation plugin; one single segment over
the whole image is always produced, no matter how I set the parameters
(foreground bias, smoothness and so on).
I am using ImageJ 1.50g (FiJi distribution) on Linux & OpenJDK 8 JRE.
Cheers, Vaclav
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