@InProceedings  {felkel99sccg,
  UPDATE  = { 2003-12-12 },
  author =      { Felkel Petr and
                  Obdr{\v z}{\' a}lek, {\v S}t{\v e}p{\' a}n },
  title =       { Improvement of Oliva's Algorithm for Surface 
                  Reconstruction from Contours },
  year =        { 1999 },
  booktitle =   { SCCG 99: Proceedings of the 15th Spring Conference on 
                  Computer Graphics },
  pages =       { 254--263 },
  editor =      { Ji{\v r}{\' i} {\v Z}{\' a}ra },
  publisher =   { Comenius University. Bratislava },
  month =       { 4--5 },
  day =         { 28--1 },
  venue =       { Budmerice, Slovakia },
  isbn =        { 80--223--1357--2 },
  annote =      { Oliva proposed an interesting algorithm for a 3D surface
                  reconstruction from contours in parallel cross-sections. As
                  stated in the article [9], the algorithm constructs the
                  surface for any non-self-intersecting contour shape also
                  with holes [9] by means of adding appropriate number of
                  intermediate cross-sections between complicated contours and
                  triangulation of every pair of contours in different slices
                  separately. For this task a Straight skeleton (Angular
                  Bisector Network) [1, 9] is exploited. We have implemented
                  Oliva's algorithm and we have found cases, which are not
                  handled properly. The resulting surface can contain
                  overhangs and self-intersected triangles can occur. We
                  propose a modification of a triangulation step in Oliva's
                  algorithm which handles differently the cases when overhangs
                  (artifacts looking like folds) can appear and generates an
                  overhang-free surface. By excluding overhangs we prevent
                  also the creation of degenerated surface with
                  mutually-intersected triangles. },
  authorship =  { 50-50 },
  psurl       = { felkel.ps.gz
[compressed postscript, 26 kB]  },
}