Conversion of a seed peduncle image to the corresponding Bézier Curve and calculation of the curvature values. Seed images were inserted in Mathematica notebook (.nb). A set of points was marked on the profile of their beaks (left). The coordinates of the points were obtained and run in a programme (Tocino and Cervantes 2008) to obtain the corresponding Bézier Curves and the graphs representing the corresponding curvature values (right).