1. J. C. Simon and K. Zerhouni, “Robust description of a line image,” inProc. First Int. Conf. om Document Analysis and Recognition, pp. 3–14, Saint Malo, France (1991).
2. An analysis of hexagonal thinning algorithms and skeletal shape representation
3. F. Chang, Y.-C. Chen, H.-S. Don, W.-L. Hsu, and C.-I. Kao, “Stroke segmentation as a basis for structural matching of Chinese characters,” inProc. 2nd Int. Conf. on Document Analysis and Recognition, Tsukuba, Japan, pp. 35–40 (1993).
4. O. Hori and S. Tanigawa, “Raster-to-vector conversion by line fitting based on contours and skeletons,” in Ref. 3, pp. 353–358.
5. J. C. Pettier and J. Camillerapp, “Script representation by a generalized skeleton,” In Ref. 18, pp. 850–853.