Multiple view reconstruction of a quadric of revolution from its occluding contours
ACCV'09 Proceedings of the 9th Asian conference on Computer Vision - Volume Part I
Robustly computing intersection curves of two canal surfaces with quadric decomposition
ICCS'06 Proceedings of the 6th international conference on Computational Science - Volume Part II
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Arising naturally in mechanical design, these shapes are easier to analyze and use in solid modeling systems than the more general quadric surfaces.