Optimal orientation estimators for detection of cylindrical objects

Christianne Mulat (1, 2) , Marc Donias (1) , Pierre Baylou (1) , Gérard Vignoles (2) , Christian Germain (1)

1 IMS - Laboratoire de l'intégration, du matériau au système
2 LCTS - Laboratoire des Composites Thermostructuraux

This paper introduces low level operators in the context of detecting cylindrical axis in 3 D images. Knowing the axis of a cylinder is particularly useful since cylinder location, length and curvature derive from this knowledge. This paper introduces a new gradient-based optimal operator dedicated to accurate estimation of the direction toward the axis. The operator relies on Finite Impulse Response filters. The approach is presented first in a 2-D context, thus providing optimal gradient masks for locating the center of circular objects. Then, a 3-D extension is provided, allowing the exact estimation of the orientation toward the axis of cylindrical objects when this axis coincides with one of the mask reference axes. Applied to more general cylinders and to noisy data, the operator still provides accurate estimation and outperforms classical gradient operators.

Mots clés: image processing; cylinder; orientation; gradient masks; 3D

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Christianne Mulat, Marc Donias, Pierre Baylou, Gérard Vignoles, Christian Germain. Optimal orientation estimators for detection of cylindrical objects. Signal, Image and Video Processing, 2008, 2 (1), pp.51-58. ⟨10.1007/s11760-007-0035-2⟩. ⟨hal-00188509⟩