This plugin for ImageJ was created by Terry Ball (Brigham Young University).
It can be used for morphometric analyses on phytoliths.
See this study for example:
Ball T.B., Davis, A., Evett, R.R., Ladwig, J.L., Tromp, M., Out, W., Portillo, M. 2016. Morphometric Analysis of Phytoliths: Recommendations towards Standardization from the International Committee for Phytolith Morphometric, Journal of Archaeological Science 68, 106-111. doi:10.1016/j.jas.2015.03.023
