Open3d: open3d.open3d.geometry.PointCloud has no "voxel_down_sample" method

[jiangwei221]

IMPORTANT: Please use the following template to report the bug.

---

Describe the bug
Tried to run example /examples/Python/Advanced/pointcloud_outlier_removal.py using open3d 0.7.0.0, which installed via conda.

To Reproduce
Steps to reproduce the behavior:

1. cd ./examples/Python/Advanced/
2. python pointcloud_outlier_removal.py
3. after closing the first visualization, the program breaks and the error is:

Load a ply point cloud, print it, and render it
Downsample the point cloud with a voxel of 0.02
Traceback (most recent call last):
  File "pointcloud_outlier_removal.py", line 27, in <module>
    voxel_down_pcd = pcd.voxel_down_sample(voxel_size=0.02)
AttributeError: 'open3d.open3d.geometry.PointCloud' object has no attribute 'voxel_down_sample'

Expected behavior
open3d.open3d.geometry.PointCloud has no "voxel_down_sample" method

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• OS:Ubuntu 18.04
• Python version: Python 3.6.5
• Open3D version: '0.7.0.0'
• Is this remote workstation?: no
• How did you install Open3D?: conda, conda install -c open3d-admin open3d

Additional context
Add any other context about the problem here.

[jiangwei221]

works if compiling from source

[griegler]

The problem is, that the online documentation is connected to the master branch and not the latest tag. Had a few of these issues lately. @yxlao can you look into this as discussed on discord?

[asylunatic]

I experience the same error (AttributeError: 'open3d.open3d.geometry.PointCloud' object has no attribute 'voxel_down_sample') for the global_registration example.

OS: Ubuntu 18.04
Open3D version: 0.7.0.0
Python version: 3.6.7
Not a remote workstation
Installed Open3D with pip: pip3 install open3d-python

@griegler is it possible to look up documentation online for the latest tag somewhere? Would love to try a working example!

[griegler]

@asylunatic not yet, unfortunately. The scripts in docs/ are set-up to build always the latest version in the master branch. It is on our list. Until then, you could either build the latest open3d from source, or the documentation by running make html in the docs/ folder (after checking out the tagged version).

[Timowas]

I also did experience the same error while performing one of my first tests, namely:
http://www.open3d.org/docs/tutorial/Basic/pointcloud.html

Which gives me the following error:

AttributeError: 'open3d.open3d.geometry.PointCloud' object has no attribute 'voxel_down_sample'

OS: Windows 10
Open3D version: 0.7.0.0
Python version: 3.7.3
Not a remote workstation
Installed Open3D by compiling from source

Can anyone explain/inform me how to perform such a basic operation?

Thanks in advance.

[griegler]

Look at the code here: https://github.com/intel-isl/Open3D/blob/v0.7.0/examples/Python/Basic/pointcloud.py
Again, the online doc shows unfortunately the master branch and not the latest released version.

@yxlao @qianyizh @germanros1987 does anybody work on that issue?

[Timowas]

Thanks for the fast reply @griegler! Sorry to ask it twice.

[abhineet99]

I had faced the same issue. Currently I'm using
from open3d.open3d.geometry import voxel_down_sample,estimate_normals
as a work around

[YiruS]

I had faced the same issue. Currently I'm using
from open3d.open3d.geometry import voxel_down_sample,estimate_normals
as a work around

Hi,

I tried your strategy and when calling "voxel_down_sample(pcd)" it shows error " voxel_down_sample(): incompatible function arguments." Do you have the similar issue before? Thanks!

[abhineet99]

I had faced the same issue. Currently I'm using
from open3d.open3d.geometry import voxel_down_sample,estimate_normals
as a work around

Hi,

I tried your strategy and when calling "voxel_down_sample(pcd)" it shows error " voxel_down_sample(): incompatible function arguments." Do you have the similar issue before? Thanks!

You need to give voxel_size as an argument as well, as you are down sampling. So the function template becomes "voxel_down_sample(pcd,voxel_size)" . Hope this helps!

[YiruS]

I had faced the same issue. Currently I'm using
from open3d.open3d.geometry import voxel_down_sample,estimate_normals
as a work around

Hi,
I tried your strategy and when calling "voxel_down_sample(pcd)" it shows error " voxel_down_sample(): incompatible function arguments." Do you have the similar issue before? Thanks!

You need to give voxel_size as an argument as well, as you are down sampling. So the function template becomes "voxel_down_sample(pcd,voxel_size)" . Hope this helps!

Thank works, thanks!

[yxlao]

close with #1055

[dopeboy]

In case anyone is running into this by way of google, the version being referenced above is now in pypi so before you try any complicated measures, try updating your package using pip3 first.

[oseh]

In case anyone is running into this by way of google, the version being referenced above is now in pypi so before you try any complicated measures, try updating your package using pip3 first.

I have updated it yet get the same issue. any help?

[arkadeepnc]

This can also be due to multiple versions of open3D associated with your interpreter.
See what version is installed : import open3d as o3d && o3d.__version__
Try pip3 uninstall open3D and see what version was uninstalled.
If the python can still import open3d after un-installation, you have another version installed! Sometimes this can be open3d-python so you can remove this by pip3 uninstall open3d-python.
This should completely remove all the open3d versions. See this link for more information: https://github.com/intel-isl/Open3D/pull/1055#issue-293960190

[oseh]

This can also be due to multiple versions of open3D associated with your interpreter.
See what version is installed : import open3d as o3d && o3d.__version__
Try pip3 uninstall open3D and see what version was uninstalled.
If the python can still import open3d after un-installation, you have another version installed! Sometimes this can be open3d-python so you can remove this by pip3 uninstall open3d-python.
This should completely remove all the open3d versions. See this link for more information: #1055 (comment)

Thank you very much. You've been very helpful.