Select these parameters to compute the orientation of Feret diameters of objects. Feret diameters are obtained by projecting the object onto a family of straight lines with angles varying from 0 to 179 degrees. ImageWarp uses a one-degree step when collecting a set of Feret diameters.
AngleFMax returns the angle at which the maximum Feret diameter is found. The maximum Feret diameter is the maximum distance between two tangents on opposite sides of the object.
AngleFMin returns the angle at which the minimum Feret diameter is found. The minimum Feret diameter is the minimum distance between two tangents on opposite sides of the object.
The direction of angle measurements depends on the Y-axis direction in the image calibration scale. If the Y-axis is pointed down (which is a default setting), the angles are measured from the positive X-axis clockwise. To measure the angles counterclockwise, reverse the direction of Y-axis. See Spatial Calibration for more details.