Fig. 1

X-ray CT workflow of walnut measurements. a Preparation of walnut samples using floral foam (12 walnuts/batch in average), b Acquisition of X-ray CT images with right images of 2D slices, c 3D reconstruction, d Preprocessing with right image showing noise and artifacts that have to be removed, e Individualization of each walnut of the batch and f XY, YZ, ZX segmentation and labelling of a walnut leading to segmentation of each different part, with the shell in red, the kernel in green and the empty space in blue