Results of this tool are derived from the Ridge Detection plugin of ImageJ.
For more information, please refer to: https://imagej.net/Ridge_Detection Steger, C., 1998. An unbiased detector of curvilinear structures. IEEE Transactions on Pattern Analysis and Machine Intelligence, 20(2), pp.113–125.
For comments on calculated descriptors please refer to: https://github.com/thorstenwagner/ij-ridgedetection/issues