What is a “feret” and what is a “displacement”?
The X, Y and Z Feret measurements (obtained from Straight Line, Curved Line and Area and Volume measurements) are the absolute distance between the minimum and maximum extents at any point within the measurement. Feret is also sometimes called the “caliper diameter”. Ferets always have positive values. The X, Y and Z Displacement measurements (obtained from Straight Line and Curved Line measurements) are the signed distance between the start and finish points. Displacements might have positive or negative values. Note that in the illustration, the Y-displacement will have a negative value.
