
Medial Axis Transform 209
(a) (b) (c)
FIGURE 6.14: Normal computation for an image CIRCLE using digital
circles for different distance functions (a) {112}, (b) {1112}, and (c) {12}.
Reprinted from Pattern Recognition Letters, 23(2002), J. Mukherjee et al., Use of Medial Axis Transforms for Com-
puting Normals at Boundary Points, 1649–1656, Copyright (2002), with permission from Elsevier.
(a) (b) (c)
FIGURE 6.15: Normal computatio n for an image RECTANGLE using digi-
tal circles for different distance functions (a) {112}, (b) {1112}, a nd (c) {12}.
Reprinted from Pattern Recognition Letters, 23(2002), J. Mukherjee et al., Use of Medial Axis Transforms for ...