Curve reconstruction algorithms are supposed to reconstruct curves from poi
nt samples. Recent papers present algorithms that come with a guarantee: Gi
ven a sufficiently dense sample of a closed smooth curve, the algorithms co
nstruct the correct polygonal reconstruction, Nothing is claimed about the
output of the algorithms, if the input is not a dense sample of a closed sm
ooth curve, e.g., a sample of a curve with endpoints. We present an algorit
hm that comes with a guarantee for any set P of input points. The algorithm
constructs a polygonal reconstruction G and a smooth curve Gamma that just
ifies G as the reconstruction from P. (C) 2000 Elsevier Science B.V. All ri
ghts reserved.