How to generate partial data based on completion data?

[supgy]

Hi，thank you for answering everyone's questions. I want to know how to generate partial data based on completion data?I want to train a model from scratch using my own data. Or how do I build my own dataset（completion point cloud、partial point cloud and labels?）

[CuiRuikai]

I am not familiar with partial point cloud generation. Usually, this should be done by projecting a 3D mesh to a depth map given a camera pose, then back project this depth map to 3D to create self-occlusion-based incompleteness. To this end, you can have a look on:

1. 3D mesh to depth: https://stackoverflow.com/questions/69699250/create-rgbd-image-from-mesh-in-open3d
2. depth to point clouds: https://www.open3d.org/docs/0.7.0/python_api/open3d.geometry.create_point_cloud_from_depth_image.html

[supgy]

I am not familiar with partial point cloud generation. Usually, this should be done by projecting a 3D mesh to a depth map given a camera pose, then back project this depth map to 3D to create self-occlusion-based incompleteness. To this end, you can have a look on:

1. 3D mesh to depth: https://stackoverflow.com/questions/69699250/create-rgbd-image-from-mesh-in-open3d
2. depth to point clouds: https://www.open3d.org/docs/0.7.0/python_api/open3d.geometry.create_point_cloud_from_depth_image.html

Hi,I mean that, I notice that each complete point cloud corresponds to eight partial point clouds in EPN-3D database，I want to know how partial point cloud generate,thanks : ) for example, a completion pcd and its coresspond partial pcd as show below:

[CuiRuikai]

The data generation process was detailed in 3D-EPN paper, Sec. 4 https://arxiv.org/pdf/1612.00101.pdf We used the point cloud format sampled by Wen et al. (Cycle4Completion)

[supgy]

Cycle4Completion

Got that, thanks for your response！