Using silhouette coherence for 3D image-based object modeling under circular motion Utilisation de la cohérence entre silhouettes pour la modélisation d’objets 3D à partir d’images de séquences en rotation

We present a new concept of silhouette coherence applied to a set of silhouettes generated by a 3D object. The proposed silhouette coherence concept is used in the problem of camera calibration for image-based 3D object modeling under circular motion. We first discuss the silhouette coherence notion and define a practical criterion to estimate it. This criterion depends both on the silhouettes and on the parameters of the cameras that generated them. These parameters can be optimized for the 3D modeling problem by maximizing the overall silhouette coherence. We present various experimental results illustrating the efficiency of the proposed silhouette coherence criterion.