Measuring the Angularity of Particle and Fiber Shapes
THE MICROSCOPE
2018, Volume 66:1, pp. 21-34
DOI
https://doi.org/10.59082/RJLE4722
AUTHOR
John C. Russ
ABSTRACT
The angularity of the shapes of particles and fibers encountered in several fields of application has been the subject of many papers and a diverse set of measurement approaches. Representative examples of different methods are shown. A new approach that offers a potential advantage of computational efficiency is presented, with results for particles of various types and comparison to some historic methods. It is based on the reduction in the perimeter of object boundaries with morphological opening and closing using different disk sizes, or potentially a single size of about 5–10% of the overall shape dimension.