3D laser imaging by backprojection

Jean-Baptiste Bellet (1) , Gérard Berginc (2)

1 IECL - Institut Élie Cartan de Lorraine
2 Thalès Optronique

In this paper, we are interested in imaging a 3D scene from a collection of 2D laser images, using advanced tomographic methods. We fi rst recall classical results about transmission tomography, including the famous FDK algorithm for cone-beam scanning. Then we use a pinhole camera model to describe the laser experiment of interest. Since this model is geometrically speaking similar with the cone-beam scanning, we use the FDK algorithm as a heuristic to reconstruct the scene. We show numerically, on real data, that this heuristic reconstructs the skeleton of an object to be imaged, even if the object is occulted.

Mots clés: transmission tomography; laser imaging; filtered backprojection; FDK algorithm

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]; Optique / photonique; Analyse numérique [math.NA]

Jean-Baptiste Bellet, Gérard Berginc. 3D laser imaging by backprojection. 2013. ⟨hal-00903871⟩