Segmentation of crack (urgent!!!)

Posted by kcl1g14 on Feb 15, 2017; 6:48pm
URL: http://imagej.273.s1.nabble.com/Segmentation-of-crack-urgent-tp5018111.html

Hi everyone, I am doing a project about microcracking of concrete. But i have a problem that the crack and void share the same intensity, so how can i segment the cracks only rather than with the void together?



Here is one of the slices of my sample, the cracks can be seen in left and right hand side, which cracks are the long, black line.