Using ImageJ to track T1 Transitions

Hi everyone,
I am currently working on a research project for school and am looking for a way to track T1 (or horizontal to vertical segment) transitions between cells. The images are from a MatLab simulation and are currently in a scatter plot, but can fairly easily be converted to a contour map if this would work better. If there is a way to do this in ImageJ, that would be awesome but if not, is there another software that would work better? Any help and inout is much appreciated.