Fig. 4From: 4D Structural root architecture modeling from digital twins by X-Ray Computed TomographyCorn root sample with a zoom window: digital twin by X-ray CT system (a), curve-skeleton extraction based on a constrained Laplacian smoothing algorithm, where the mesh is in orange and the skeleton is in red (b), and the RSA model based on a flexible cylinder fitting, where each branch is in different color (c)Back to article page