Image processing apparatus and image processing method
A filter process is performed on point cloud data using a representative value of the point cloud data for each local region obtained by dividing a three-dimensional space. A two-dimensional plane image on which the point cloud data subjected to the filter process is projected is encoded, and a bitstream is generated. The present disclosure can be applied to, for example, an information processing apparatus, an image processing apparatus, electronic equipment, an information processing method, a program, or the like.
1. An image processing apparatus comprising:
circuitry configured to:
divide a three-dimensional space containing point cloud data into a plurality of grids;
derive, for the grids, respective representative values of the point cloud data;
perform a filter process on the point cloud data by performing trilinear smoothing of the respective representative values of the grid; and
encode a two-dimensional plane image on which the point cloud data subjected to the filter process, and generate a bitstream related to the encoded two-dimensional plane image.
2. The image processing apparatus according to claim 1 , wherein
the grids each have a cube shape having a predetermined size.
3. The image processing apparatus according to claim 1 , wherein
the grids each have a rectangular parallelepiped shape having a predetermined size.
4. The image processing apparatus according to claim 1 , wherein
the circuitry is configured to generate the bitstream including information regarding at least one of a size or a shape of each grid.
5. The image processing apparatus according to claim 1 , wherein
each of the respective representative values includes an average of the point cloud data contained in a corresponding one of the grids.
6. The image processing apparatus according to claim 1 , wherein
each of the respective representative values includes a median of the point cloud data contained in a corresponding one of the grids.
7. The image processing apparatus according to claim 1 , wherein
the circuitry is configured to perform the trilinear smoothing on geometry information on points of the point cloud data.
8. The image processing apparatus according to claim 1 , wherein
the circuitry is configured to perform the trilinear smoothing on attribute information on points of the point cloud data.
9. The image processing apparatus according to claim 1 , wherein
the circuitry performs the filter process on a point of the point cloud data corresponding to an end portion of a patch included in the two-dimensional plane image.
10. An image processing method performed by an electronic device, the method comprising:
dividing a three-dimensional space containing point cloud data into a plurality of grids;
deriving, for the grids, respective representative values of the point cloud data;
performing a filter process on the point cloud data by performing trilinear smoothing of the respective representative values of the grid; and
encoding a two-dimensional plane image on which the point cloud data subjected to the filter process, and generate a bitstream related to the encoded two-dimensional plane image.
11. An image processing apparatus comprising:
circuitry configured to: therefor
decode a bitstream and generate coded data of a two-dimensional plane image on which point cloud data is projected;
reconstruct the point cloud data from the two-dimensional plane image;
divide three-dimensional space containing the reconstructed point cloud data into a plurality of grids;
derive, for the grids, respective representative values of the reconstructed point cloud data; and
perform a filter process on the reconstructed point cloud data by performing trilinear smoothing of the respective representative values of the grids.
12. An image processing method performed by an electronic device, the method comprising:
decoding a bitstream and generate coded data of a two-dimensional plane image on which point cloud data is projected;
reconstructing the point cloud data from the two-dimensional plane image;
dividing three-dimensional space containing the reconstructed point cloud data into a plurality of grids;
deriving, for the grids, respective representative values of the reconstructed point cloud data; and
performing a filter process on the reconstructed point cloud data by performing trilinear smoothing of the respective representative values of the grids.