How to save point cloud data? (sfm)

Hello.

I followed the guideline below and I got a 3D point cloud view.

https://kr.mathworks.com/help/vision/examples/structure-from-motion-from-two-views.html

My question is ' How to save this point cloud data?'. I want to use this point cloud to do a delaunay triangulation.

such as.. trisurf method.. I want to apply on the point cloud data.. please help me.. : )

Answer 1

[Harsh]

Based on the example you referred to, the point cloud is an Object for storing a 3-D point cloud. For example the example uses this:

ptCloud = pointCloud(points3D, 'Color', color);

If you want to create a separate copy of a point cloud, you can use the MATLAB copy method. You can read more about this here under tips:

https://www.mathworks.com/help/vision/ref/pointcloud-class.html

It does appear however, that you would like to save this data to use for further processing. For this, you can use the MATLAB "save" method that can be used to save specific variables to various file formats such as ".mat" or ".txt". For example, after the above line, you can use the following line to save the workspace variable to a mat file:

>> save('pointCloud.mat','ptCloud')

You can learn more about this here:

https://www.mathworks.com/help/matlab/ref/save.html#btppzj8-1

[Walter Roberson]

If you want to extract the xyz coordinates then

ptCloud.Location

will give them.

[Yu Lan]

If I want to save the point cloud file as the .ply or .pcd, is it possible?