How to output the dense point cloud or high quality mesh

[junhua-l]

Hi, I want to export the dense point cloud or high-quality mesh.

I tried to export mesh, but the accuracy is very poor.

Point cloud I started directly from the output point cloud, and then SH2RGB to the normal point cloud. However, I found that the point cloud derived in this way is far inferior to traditional 3D reconstruction methods, such as dense reconstruction colmap. (1) I increased the number of Gaussian during training by changing densify_from_iter, but the resulting point cloud quality was still not good (in the case that the number of point clouds was much larger than the point clouds generated by dense reconstruction), I think simply increasing the number of Gaussian is not a good method. (2) I replaced the initial random points3D.ply with the point cloud generated by my dense reconstruction. I found that because of the nature of Gaussian, the number of meaningful points has been decreasing, and then a lot of noise points are added, so the point cloud obtained after training is still not as dense reconstruction.

I would like to know if there is any idea to export a high-quality point cloud or mesh. This may not be the focus of this paper, but it could also be important.