A seed image was converted to the corresponding Bézier Curve and the curvature values calculated. Seed images were inserted in Mathematica notebook (.nb) and a set of points was marked defining the profile of the whole seed (left). The coordinates of the points were obtained (b) and run in a programme (Tocino and Cervantes 2008) to obtain the corresponding Bézier Curves, from which graphs representing the corresponding curvature values were obtained (right).

  Part of: Cervantes E, Martín-Gómez JJ, Espinosa-Roldán FE, Muñoz-Organero G, Tocino Á, Cabello Sáenz de Santamaría F (2021) Seed apex curvature in key Spanish grapevine cultivars. Viticulture Data Journal 3: e66478. https://doi.org/10.3897/vdj.3.e66478