如何检查点云/ 3d 对象上的某些坐标？

Question

I have a point cloud of a human body and 3d scan of it. I have some coordinates of skeleton joints but I want to check if the coordinates fit the body/point cloud or not.

I have tried to do that with python open3d and pangolin c++ but I couldn't figure out how to do that.

I have X, Y, Z coordinates of a point and I want to see where it is in my point cloud. To explain my question I have an example image that is done with paint.

I need advice about what I can use to do that.

Answer 1

It depends on if you want to check visually or automatically.

The visually check is very easy to do with Open3D (at least, installation is much easier than PCL-Python)

First, you need to install open3d packages. Then read your point clouds by:

import open3d as o3d
pcd = o3d.io.read_point_cloud(file_path)

Then generate two red point cloud in o3d: # I think your x(3,1) means x for two points

import numpy as np

pcd_red = o3d.geometry.PointCloud()

xyz = np.asarray([[3, 2, 8],
                  [1, 8, 3]])

pcd_red.points = o3d.utility.Vector3dVector(xyz)

# paint them to red
pcd_red.paint_uniform_color([1, 0, 0])

Finally is display:

o3d.visualization.draw_geometries([pcd, pcd_red])