Distance transformations in digital images
Computer Vision, Graphics, and Image Processing
Sequential Operations in Digital Picture Processing
Journal of the ACM (JACM)
Continuous Skeletons from Digitized Images
Journal of the ACM (JACM)
Computer representation of planar regions by their skeletons
Communications of the ACM
Medial axis for chamfer distances: computing look-up tables and neighbuorhoods in 2D or 3D
Pattern Recognition Letters
Exact medial axis with euclidean distance
Image and Vision Computing
Rectification of the chordal axis transform and a new criterion for shape decomposition
DGCI'05 Proceedings of the 12th international conference on Discrete Geometry for Computer Imagery
DGCI'09 Proceedings of the 15th IAPR international conference on Discrete geometry for computer imagery
Integer approximation of 3D chamfer mask coefficients using a scaling factor in anisotropic grids
Pattern Recognition Letters
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Chordal Axis (CA) is a new representation of planar shapes introduced by Prasad in [1], useful for skeleton computation, shape analysis, characterization and recognition The CA is a subset of chord and center of discs tangent to the contour of a shape, derivated from Medial Axis (MA) Originally presented in a computational geometry approach, the CA was extracted on a constrained Delaunay triangulation of a discretely sampled contour of a shape Since discrete distance transformations allow to efficiently compute the center of distance balls and detect discrete MA, we propose in this paper to redefine the CA in the discrete space, to extract on distance transforms in the case of chamfer norms, for which the geometry of balls is well-known, and to compare with MA.