Figure 2.

Overview of seeds divided into three classes based on visual colour of seed coat: yellow, grey and black. Row (A) shows RGB images of the intact seeds; (B) is images transformed by nCDA to divide dead and viable seeds (intact seeds); (C) is RGB images of cut seeds; (D) is images transformed by nCDA to divide dead and viable seeds (based on cut seeds) and (E) is RGB images taken after the cut seeds has been immersed in tetrazolium.