Feret ratio.

The ratio of Feret Minimum (arivis) to Feret Maximum (arivis) is calculated. This ratio makes it possible to make statements on the form of the measured objects. If the feret ratio has a low value, long, elongated objects are present. Values approaching 1 indicate the presence of compact or circular objects, as in this case Feret Minimum (arivis) and Feret Maximum (arivis) have very similar values. The Form Circle is also suitable for making statements on the circularity of an object.

• Formula: Feret Minimum (arivis) / Feret Maximum (arivis)
• Unit: none
• Value range: 0 ... 1