[Concept] Flatness 2d

computation of distance from shape tops to considered line

This measure is based on LeastSquareLine2d measure results.

It computes, given a shape and associated line 2d approximation, signed distance to estimated line from each top of shape :

Estimated line can be computed using a simple parametric estimation of shape tops or can be computed using a robust estimation technic. This behavior is ruled by measure parameter, see ipsdk::imaproc::attr::RobustEstimationConfig.

For more information on line 2d estimation please refer to LeastSquareLine2d.