Silüet ve optik üçgenleştirme ile yüzey geriçatımı için hacimsel bir tümleştirme tekniği

A Volumetric Fusion Technique for SurfaceReconstruction from Silhouettes andOptical TriangulationAbstractOptical triangulation, an active reconstruction technique, is known to be an accuratemethod but has several shortcomings due to occlusion and laser reflectance properties ofthe object surface that often lead to holes and inaccuracies on the recovered surface.Shape from silhouette, on the other hand, is a passive reconstruction technique that yieldsrobust, hole-free reconstruction of the visual hull of the object. In this thesis, a hybridsurface reconstruction method that fuses geometrical information obtained fromsilhouette images and optical triangulation is proposed. Our motivation is to recover thegeometry from silhouettes on those parts of the surface which the range data fail tocapture. Silhouettes and laser range images of the object are acquired with a calibratedcamera and re-projected onto a fixed 3D world coordinate system where the fusionprocess takes place. A volumetric octree representation is first obtained from thesilhouette images and then carved by range points to amend the missing cavityinformation inherent in silhouette-based techniques. An average isolevel value on eachcorner of each surface cube in the carved octree structure is accumulated using partialsurface triangulations obtained separately from range data and silhouettes. The marchingcubes algorithm is applied for triangulation of the resulting isolevel surface and the finalshape is constructed by fairing the 3D model. The performance of the proposed techniqueis demonstrated on several real objects.Advisor: Yücel Yemez Date:Director: Yaman Arkun Date: