What is "granulometry"

n. (context geology English) the measurement of the sizes of mineral grains in sedimentary rock

Granulometry is the measurement of the size distribution in a collection of grains.

• Granulometry (morphology): Granulometry computation using the morphological opening operation.
• Optical Granulometry: Computation of granulometries from images, and its use in mines.

In mathematical morphology, granulometry is an approach to compute a size distribution of grains in binary images, using a series of morphological opening operations. It was introduced by Georges Matheron in the 1960s, and is the basis for the characterization of the concept of size in mathematical morphology.