Alternative to threshold

Posted by kirill8910 on Dec 07, 2011; 5:53pm
URL: http://imagej.273.s1.nabble.com/Alternative-to-threshold-tp3682337.html

Hello!

I'm trying to separate the cracks out (picture) as precise as possible. Grains on the background make ordinary threshold tricky. On other images that I have direction of cracks and grains could be the same, so Sobel like operators dont fit unfortunately.


Is it possible to provide labeling or segmenting according to cracks intensity change (cracks have at least sharp slope in the intensity change (plot profile))?

Could you suggest me any plugin or algorithm where I can set this kind of criteria for the segmentation.

Thank you!