Predicted height versus scan image (scatter plot of the image data with color as a function of height) for the one-bead leg and three-bead leg of L-1 and L-2: (a) L-1: predicted height for the one-bead leg versus scatter plot of image data for the one-bead leg (wall 1), (b) L-1: predicted height for wall 2, wall 3, and wall 4 of the three-bead leg versus scatter plot of image data for the three-bead leg (walls 2, 3, and 4 cannot be differentiated in the scan image), (c) L-2: predicted height for the one-bead leg versus scatter plot of image data for the one-bead leg, and (d) L-2: predicted height for walls 2, 3, and 4 of the three-bead leg versus scatter plot of image data for the three-bead leg