Fig. 4From: Validation of a photogrammetric approach for the objective study of early bowed instrumentsContour delineation process. Left: Extreme points computed on a wide grid (Step 1). Right: points and shortest path on the mesh. Red: extreme points (Step 1), filled blue: nearest neighbours (Step 2), empty blue: added intermediate vertices (Step 3), dashed gray: shortest paths between two consecutive nearest neighbours (Step 3)Back to article page