Length of a fiber-like region.

To calculate the fiber length, a structure that is actually similar to a fiber is required. Here it is not the distance between a start and end point that is determined. The check can be done using the Form Circle, among other things.

• Formula: ¼ × (Perimeter Unscaled + (Sqrt (Perimeter Unscaled² - 16 × Area Unscaled))
• Unit: pixels