3D Shape Modelling and Estimation through a Constrained Estimation of a
Bicubic B-spline Surface
X. Shen, M. Spann
Submitted to BMVC '98, Southampton, UK, Sept. 1998
Abstract
This paper presents a new method to extract the 3D shape of objects from
3D grey level images using a bicubic B-spline surface model. Extraction
of object shape is achieved through a hierarchical surface fitting by exploiting
the multi-scale representation of the model. A strategy for converting
the surface estimation into curve estimations is devised. The model surface
is estimated by successively computing a set of cubic B-spline curves consisting
of a co-ordinate curve net defining the surface. A regularising component
is incorporated into the curve estimation to encourage the generation of
an orthogonal coordinate curve net, preventing the creation of unwanted
creases. Experimental results are presented for extracting the 3D shape
of objects from real 3D images.
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