Hybrid approach for fast occlusion processing in computer-generated hologram calculation

Antonin Gilles (1) , Patrick Gioia (2, 1) , Rémi Cozot (3, 1) , Luce Morin (4, 1)

1 Advanced Media Content
2 Orange Labs R&D [Rennes]
3 FRVSense - FRVSense
4 IETR - Institut d'Électronique et des Technologies du numéRique

A hybrid approach for fast occlusion processing in computer generated hologram calculation is studied in this paper. The proposed method is based on the combination of two commonly used approaches, which complement one another: the point-source and wave-field approaches. By using these two approaches together, the proposed method thus takes advantages from both of them. In this method, the 3D scene is first sliced into several depth layers parallel to the hologram plane. Light scattered by the scene is then propagated and shielded from one layer to another using either a point-source or a wave-field approach according to a threshold criterion on the number of points within the layer. Finally, the hologram is obtained by computing the propagation of light from the nearest layer to the hologram plane. Experimental results reveal that the proposed method does not produce any visible artifact and outperforms both the point-source and wave-field approaches.

Mots clés: Color holography; Computer-Generated Hologram; Three-dimensional imaging; Holography; Computer holography

Domaines: Optique / photonique; Synthèse d'image et réalité virtuelle [cs.GR]; Traitement des images [eess.IV]; Traitement du signal et de l'image [eess.SP]

Antonin Gilles, Patrick Gioia, Rémi Cozot, Luce Morin. Hybrid approach for fast occlusion processing in computer-generated hologram calculation. Applied optics, 2016, 55 (20), pp.5459 - 5470. ⟨10.1364/AO.55.005459⟩. ⟨hal-01415697v2⟩