Cannot import pcl

[xuanvinhilb]

I installed python-pcl using python_pcl-0.3-cp35-cp35m-win_amd64.whl.
I have some questions as follows:

1. Does the wheel contain the source code for PCL? (PCL is significantly larger than wheel file in size)
2. I successfully install python-pcl using the wheel and check whether the modules is install by using "pip list". There is python-pcl in the list. However, the error arises when I tried to import pcl.

(py35) C:\Users\xuanv\Downloads>python test.py
Traceback (most recent call last):
File "test.py", line 1, in
import pcl
File "C:\Users\xuanv\AppData\Local\conda\conda\envs\py35\lib\site-packages\pcl_init_.py", line 5, in
from ._pcl import *
ImportError: DLL load failed: The specified module could not be found.

Do you have any idea what is going on?

Thanks

[skyline624]

same for me but works with the msi version on Windows 10 with Python 3.6
no need to install pcl

[xuanvinhilb]

Hi,

Thank for your reply. I managed to install Python-PCL already. The above error is due to the missing of necessary path to libraries in the PATH environment.
In addition, I would like to compute normal vector for each point using normal estimation (http://pointclouds.org/documentation/tutorials/normal_estimation.php).
Do you support for the computation of normal estimation including OpenMP for acceleration?

Thanks,

[medakk]

@xuanvinhilb Did you figure out how to compute normal estimates? I'm trying but it keeps failing:

# X is a numpy array
P = pcl.PointCloud(X[:,:3])
ne = pcl.NormalEstimation(P)
ne.set_SearchMethod(pcl.KdTree())
ne.set_RadiusSearch(0.3)
n = ne.compute()

It fails saying [pcl::NormalEstimation::initCompute] Init failed.

[xuanvinhilb]

Hi medakk,

Can you try the code below? Just changing the cloud and test if it work.

Thanks,

---

-- coding: utf-8 --

"""
Created on Wed Aug 15 19:21:54 2018

@author: xuanv
"""
import pandas as pd
import numpy as np
import time
import pcl
import os

fileName = 'ValeroTK324_Cropped_2millionspoints.pcd'
start_time = time.time()
print('Step 1: Load PCD file ... ')
inputPointCloud = pcl.load(fileName)
searching_neighbour= {'knn_search': 25}
print(" - number of point",inputPointCloud.repr())
feat = inputPointCloud.make_NormalEstimation()
if 'range_search' in searching_neighbour.keys():
# Range search
searching_para = searching_neighbour['range_search'] if searching_neighbour['range_search'] > 0 else 0.1
feat.setRadiusSearch(searching_para)
elif 'knn_search' in searching_neighbour.keys():
# kNN search
searching_para = int(searching_neighbour['knn_search']) if int(searching_neighbour['knn_search']) > 5 else 20
tree = inputPointCloud.make_kdtree()
feat.set_SearchMethod(tree)
feat.set_KSearch(searching_para)
else:
print('Define researching method does not support')
start_time = time.time()
normals = feat.compute()
print(" - compute normal vectors in ",time.time() - start_time)

[Ajay1207]

Hi,

I installed python-pcl-0.3.win-amd64-py3.5.msi

after installing I am facing this issue

from ._pcl import *
ImportError: No module named 'pcl._pcl'

This the content of pcl directory after installing. am I missing anything here?

[xuanvinhilb]

The above error is probably due to the missing of necessary path to libraries in the PATH environment. You can use dependency walker to find which library is missing (http://www.dependencywalker.com/)

[Ajay1207]

@xuanvinhilb Thanks for replying. I have followed the steps mentioned in https://github.com/strawlab/python-pcl#set-before-environment-variable

I installed the PCL 1.6.0 All-In-One Installer

and I have copied these path

[xuanvinhilb]

It is usually because of missing Xerces-C. I strongly recommend you to use dependency walker to find exactly which library is missing.

[medakk]

@xuanvinhilb
Thank you very much!! Your code works for me!

One small correction:
feat.setRadiusSearch(searching_para) should be feat.set_RadiusSearch(searching_para).

[Ajay1207]

Hi,

I installed python-pcl-0.3.win-amd64-py3.5.msi

after installing I am facing this issue

from ._pcl import *
ImportError: No module named 'pcl._pcl'

This the content of pcl directory after installing. am I missing anything here?

I solved the issue by following the steps below.

1. Uninstalled anaconda
2. Installed python 3.5.2
3. Installed PCL 1.9.0
4. Ensured all the path are correct ref https://github.com/strawlab/python-pcl
5. Installed python-pcl 0.3 for python 3.5
6. Now I was able to import pcl succesfully
7. Still pcl.visualization was creating problems so I edited:
   pcl/init.py (uncomment .pcl_visualization import * ln 7)
8. After this I was able to use pcl and visualization properly.
   

[FelipeDelgadoR]

Hi, I'm also having troubles with this and I'm pretty sure that's because of the environment variables...
I don't know why but they don't seem to work as they should ($(OPEN_NI_ROOT) nor $(VTK_ROOT) are there)

Any help please...

[Ajay1207]

What is your python version?

…

On Fri, 1 Feb 2019, 3:00 pm noxferatus, ***@***.***> wrote: Hi, I'm also having troubles with this and I'm pretty sure that's because of the environment variables... I don't know why but they don't seem to work as they should ($(OPEN_NI_ROOT) nor $(VTK_ROOT) are there) Any help please... — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#218 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AWMxZ3Z6_UrPBRMmc1YZoIycmXUIKCmVks5vJAk2gaJpZM4VYTXt> .

[FelipeDelgadoR]

Python 3.4
PCL 16

[Ajay1207]

I suggest use pcl 1.8.1 or 1.9 as python-pcl latest build are for these.

…

On Sat, 2 Feb 2019, 9:45 pm noxferatus, ***@***.***> wrote: Python 3.4 PCL 16 — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#218 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AWMxZ-cNRvyV_ZduMuMvShlpgXllXB7vks5vJbm-gaJpZM4VYTXt> .

[wedesoft]

I had to add C:\\Program Files\OpenNI2\Redist to the system PATH to get it to work under Windows.

[Bastiiiiii]

I had the same issue and had to download OpenNI2 and add the OpenNI2.dll from the Tools folder of OpenNI to the PATH.
I use Windows 10 Python 3.6 and installed python-pcl through the wheel file.

[lonlonago]

@Bastiiiiii how did you do it ?

[zhouenbo]

I got the same problem. How to solve the import problem mentioned above? Could you please give some detail explanation?

[kathanvyas]

I installed python-pcl using python_pcl-0.3-cp35-cp35m-win_amd64.whl.
I have some questions as follows:

1. Does the wheel contain the source code for PCL? (PCL is significantly larger than wheel file in size)
2. I successfully install python-pcl using the wheel and check whether the modules is install by using "pip list". There is python-pcl in the list. However, the error arises when I tried to import pcl.

(py35) C:\Users\xuanv\Downloads>python test.py
Traceback (most recent call last):
File "test.py", line 1, in
import pcl
File "C:\Users\xuanv\AppData\Local\conda\conda\envs\py35\lib\site-packages\pcl__init__.py", line 5, in
from ._pcl import *
ImportError: DLL load failed: The specified module could not be found.

Do you have any idea what is going on?

Thanks

@xuanvinhilb were you able to solve this error? I have tried everything but seems nothing works.

[sevenandseven]

can you tell me how to slove this question?I installed python-pcl-0.3.win-amd64-py3.5.msi

after installing I am facing this issue

from ._pcl import *
ImportError: No module named 'pcl._pcl'

[renezurbruegg]

Had the same error.

Adding "C:\Program Files\OpenNI2\Redist" and "C:\Program Files\OpenNI2\Samples\Bin" to the path fixed it.

I am using Windows10, python 3.7.3 and PCL 1.9.1.

[mastrogiorgis]

I also get the same error. Will this be resolved?

[aravindsairam]

Works for both python2 and python3 (mention python3 if needed)

• $ sudo pip install cython==0.25.2
• clone this repo https://github.com/udacity/RoboND-Perception-Exercises
• $ cd RoboND-Perception-Exercises/python-pcl
• $ python setup.py build -i
• $ sudo python setup.py install
• $ sudo apt-get install pcl-tools
• export PYTHONPATH=$PYTHONPATH:/usr/local/lib (This is my python path)

If importing pcl outside this directory still give the same error, then uninstall the existing pcl.

• pip uninstall pcl

[lavalmsc]

I had the same issue and had to download OpenNI2 and add the OpenNI2.dll from the Tools folder of OpenNI to the PATH.
I use Windows 10 Python 3.6 and installed python-pcl through the wheel file.

I had to add C:\\Program Files\OpenNI2\Redist to the system PATH to get it to work under Windows.

I added all the above-mentioned locations to the system path but still got the same error. any idea? tnx

[lavalmsc]

The above error is probably due to the missing of necessary path to libraries in the PATH environment. You can use dependency walker to find which library is missing (http://www.dependencywalker.com/)

I am very new to all these issues and I have the same problem. could you explain how to use dependency walker for this special case?

[ghost]

@xuanvinhilb Thanks for replying. I have followed the steps mentioned in https://github.com/strawlab/python-pcl#set-before-environment-variable

I installed the PCL 1.6.0 All-In-One Installer

and I have copied these path

That was easy and helpfull thanks buddy