Figure 6
From: A Deep Learning Framework for Design and Analysis of Surgical Bioprosthetic Heart Valves

NURBS-aware convolution. In order to learn from a 3D surface, we extract the control points of the NURBS surface in the parametric space, which introduces spatial structure to the control points. We restructure the control points (from the parametric space) into three channels of an image (texture representation) to perform traditional convolution operations.