Filling Holes in Complex Surfaces using Oriented Voxel Diffusion

Range scanning devices often yield imperfect surface sampling for real-world models with complex features. These holes in the surface are commonly filled with smooth patches conforming to the boundaries. We introduce an oriented voxel diffusion method to fill holes in complex surfaces. First, an initial field of oriented distance is measured according to the existing surface. The implicit surface of the oriented distance field coincides with the existing surface. Second, the oriented distance field diffuses inward the hole until the implicit surface converges. Particularly, the orientation information in the distance field is used to control the diffusion direction accurately. Therefore this method is able to restore the sharp features