Method and apparatus for compressing point cloud data
Disclosed herein is a method for compressing point cloud data. The method includes quantizing input point cloud data, generating a global motion matrix based on the quantized point cloud data, applying the global motion matrix based on whether local motion compression is performed, and compressing data to which the global motion matrix is applied.
1. A method for compressing point cloud data, performed by an apparatus for compressing point cloud data, comprising:
quantizing input point cloud data;
generating a global motion matrix based on the quantized point cloud data;
applying the global motion matrix based on whether local motion compression is performed; and
compressing data to which the global motion matrix is applied,
wherein generating the global motion matrix includes correcting the global motion matrix based on a quantization coefficient applied to the input point cloud data.
2. The method of claim 1 , wherein applying the global motion matrix comprises, when local motion compression is performed, applying the global motion matrix to all of the input point cloud data.
3. The method of claim 2 , wherein applying the global motion matrix comprises, when local motion compression is not performed, applying the global motion matrix to points in the input point cloud data differently depending on whether global motion characteristics are present.
4. The method of claim 3 , wherein applying the global motion matrix comprises applying the global motion matrix to points in which global motion characteristics are present in the input point cloud data.
5. The method of claim 1 , wherein correcting the global motion matrix comprises correcting the global motion matrix using the quantization coefficient and a correction coefficient.
6. The method of claim 5 , wherein the correction coefficient is set differently depending on a value of the global motion matrix.
7. The method of claim 1 , wherein compressing the data includes performing local motion compression, geometric compression, and arithmetic compression.
8. An apparatus for compressing point cloud data, comprising:
memory in which at least one program is recorded; and
a processor for executing the program,
wherein the program includes instructions for performing
quantizing input point cloud data;
generating a global motion matrix based on the quantized point cloud data;
applying the global motion matrix based on whether local motion compression is performed; and
compressing data to which the global motion matrix is applied,
wherein generating the global motion matrix includes correcting the global motion matrix based on a quantization coefficient applied to the input point cloud data.
9. The apparatus of claim 8 , wherein applying the global motion matrix comprises, when local motion compression is performed, applying the global motion matrix to all of the input point cloud data.
10. The apparatus of claim 9 , wherein applying the global motion matrix comprises, when local motion compression is not performed, applying the global motion matrix to points in the input point cloud data differently depending on whether global motion characteristics are present.
11. The apparatus of claim 10 , wherein applying the global motion matrix comprises applying the global motion matrix to points in which global motion characteristics are present in the input point cloud data.
12. The apparatus of claim 8 , wherein correcting the global motion matrix comprises correcting the global motion matrix using the quantization coefficient and a correction coefficient.
13. The apparatus of claim 12 , wherein the correction coefficient is set differently depending on a value of the global motion matrix.
14. The apparatus of claim 8 , wherein compressing the data includes performing local motion compression, geometric compression, and arithmetic compression.