Figure 4From: Separation of overlapping dental arch objects using digital records of illuminated plaster castsIdentification steps of common boundary detection presenting a selected area of the original image, b dental subimage with two connected neighbouring regions, c, d details of areas (A) and (B) with smoothed boundaries, e, f vectors related to the second derivative of the boundaries showing local convexity in areas (A) and (B), and g resulting segmentation.Back to article page