Figure 16
From: An ordered topological representation of 3D triangular mesh facial surface: concept and applications
OCDC contour-based alignment: (a) OCDC contours of two faces. Notice that the first point in each contour (marked by *) are at different locations. (b) and (c) alignment of the largest OCDC contours. (d) The OCDC contours of the second face instance after undergoing the rotation shift. (e) Faces aligned with rotation estimated with two largest contours depicted in (b).