Method and apparatus for annealing iterative geometry smoothing

An apparatus for decoding a video stream encoded using video point cloud coding, the apparatus comprising:

• at least one memory configured to store program code;
• and
• at least one processor configured to read the program code and operate as instructed by the program code, the program code comprising:
• first obtaining code configured to cause the at least one processor to obtain a geometry-reconstructed point cloud;
• dividing code configured to cause the at least one processor to divide the geometry-reconstructed point cloud into a plurality of cells, wherein a cell of the plurality of cells comprises a first plurality of points;
• second obtaining code configured to cause the at least one processor to obtain, from among the first plurality of points, a first reference point comprising a centroid of the first plurality of points;
• first generating code configured to cause the at least one processor to generate a second plurality of points by applying a first filter to the first plurality of points based on the first reference point;
• third obtaining code configured to cause the at least one processor to obtain, from among the second plurality of points, a second reference point comprising a centroid of the second plurality of points;
• second generating code configured to cause the at least one processor to generate a third plurality of points by applying a second filter to the second plurality of points based on the second reference point;
• fourth obtaining code configured to cause the at least one processor to obtain a smoothed geometry-reconstructed point cloud based on the third plurality of points;
• and
• reconstructing code configured to cause the at least one processor to reconstruct a dynamic point cloud using the smoothed geometry-reconstructed point cloud,
• wherein a strength of the first filter is higher than a strength of the second filter.

A non-transitory computer-readable medium storing computer instructions decoding a video stream encoded using video point cloud coding that, when executed by at least one processor, cause the at least one processor to:

• obtain a geometry-reconstructed point cloud;
• divide the geometry-reconstructed point cloud into a plurality of cells, wherein a cell of the plurality of cells comprises a first plurality of points;
• obtain, from among the first plurality of points, a first reference point comprising a centroid of the first plurality of points;
• generate a second plurality of points by applying a first filter to the first plurality of points based on the first reference point;
• obtain, from among the second plurality of points, a second reference point comprising a centroid of the second plurality of points;
• generate a third plurality of points by applying a second filter to the second plurality of points based on the second reference point;
• obtain a smoothed geometry-reconstructed point cloud based on the third plurality of points;
• and
• reconstruct a dynamic point cloud using the smoothed geometry-reconstructed point cloud,
• wherein a strength of the first filter is higher than a strength of the second filter.