Abstract
We present a method to super-resolve voxelized point clouds down-sampled
by a fractional factor, using look-up-tables (LUT) constructed from
self-similarities from its own down-sampled neighborhoods. Given a
down-sampled point cloud geometry Vd, and its corresponding fractional
down-sampling factor s, the proposed method determines the set of
positions that may have generated Vd, and estimates which of these
positions were indeed occupied (super-resolution). Assuming that the
geometry of a point cloud is approximately self-similar at different
scales, LUTs relating down-sampled neighborhood configurations with
children occupancy configurations can be estimated by further
down-sampling the input point cloud to Vd2 , and by taking into account
the irregular children distribution derived from fractional
down-sampling. For completeness, we also interpolate texture by
averaging colors from adjacent neighbors. We present extensive test
results over different point clouds, showing the effectiveness of the
proposed method against baseline methods.