OPENNI and OPENCV

[Faisal Mazhar]

I want to use OPENCV for Kinect. But I don't have any idea how to do
that. I heard that it's possible if I configure OpenCV with OPENNI.
But before that I have to configure CMAKE so that it enables OPENNI.
How to enable OPENNI in CMAKE so that I can configure OPENCV with
OPENNI ?

[Carlos Roberto]

Hi,
When you download the OpenCV package you will get a CMakeLists.txt file where OPENNI is already configured and you can enable or disable its use.
Cheers.

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[Faisal Mazhar]

Thanks a lot Mr Carlos. But now I see that CMAKE can't find the PRIME
SENSOR MODULE. I have installed the prime sensor, but still cmake
can't find it. What could be the problem? Thanks it advance.

On Jan 18, 7:42 pm, Carlos Roberto <carlo...@gmail.com> wrote:
> Hi,
> When you download the OpenCV package you will get a CMakeLists.txt file
> where OPENNI is already configured and you can enable or disable its use.
> Cheers.
>

> On Wed, Jan 18, 2012 at 3:54 PM, Faisal Mazhar <faisalmodes...@gmail.com>wrote:
>
>
>
>
>
>
>
>
>
> > I want to use OPENCV for Kinect. But I don't have any idea how to do
> > that. I heard that it's possible if I configure OpenCV with OPENNI.
> > But before that I have to configure CMAKE so that it enables OPENNI.
> > How to enable OPENNI in CMAKE so that I can configure OPENCV with
> > OPENNI ?
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "OpenNI" group.
> > To post to this group, send email to openn...@googlegroups.com.
> > To unsubscribe from this group, send email to
> > openni-dev+...@googlegroups.com.
> > For more options, visit this group at
> >http://groups.google.com/group/openni-dev?hl=en.
>
> --
> Carlos Roberto, MSc
> Software Eng. Consultant @ IBM

> My Blog <http://kinect-i.blogspot.com/>
> My LinkedIn <http://br.linkedin.com/pub/carlos-lacerda-msc/5/964/378>
> follow me @ twitter <http://twitter.com/#%21/ze_tech>
> My YouTube videos <http://youtu.be/_x6m8IXMTXI>

[Gabriele]

Take a look here:
http://opencv.itseez.com/doc/user_guide/ug_highgui.html

;)

[Carlos Roberto]

If cmake can not find OPENNI, then you can type the path manually for each variable in cmake regarding to OPENNI.
Cheers.

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[Andol]

using cmake-gui, tick the option of OPENNI, it works

On Jan 18, 9:50 pm, Carlos Roberto <carlo...@gmail.com> wrote:
> If cmake can not find OPENNI, then you can type the path manually for each
> variable in cmake regarding to OPENNI.
> Cheers.
>

> On Wed, Jan 18, 2012 at 7:39 PM, Gabriele <gabriele.fontanar...@gmail.com>wrote:
>
>
>
>
>
>
>
>
>
> > Take a look here:
> >http://opencv.itseez.com/doc/user_guide/ug_highgui.html
>
> > ;)
>
> > On 18 Gen, 18:54, Faisal Mazhar <faisalmodes...@gmail.com> wrote:
> > > I want to use OPENCV for Kinect. But I don't have any idea how to do
> > > that. I heard that it's possible if I configure OpenCV with OPENNI.
> > > But before that I have to configure CMAKE so that it enables OPENNI.
> > > How to enable OPENNI in CMAKE so that I can configure OPENCV with
> > > OPENNI ?
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "OpenNI" group.
> > To post to this group, send email to openn...@googlegroups.com.
> > To unsubscribe from this group, send email to
> > openni-dev+...@googlegroups.com.
> > For more options, visit this group at
> >http://groups.google.com/group/openni-dev?hl=en.
>
> --
> Carlos Roberto, MSc
> Software Eng. Consultant @ IBM

[Faisal Mazhar]

Thanks all of you for your clear answers. Cmake now shows that it does
configure OpenCV with OpenNI, as I can see in the cmakecache where the
directories for Xncore.dll files and the directory from prime sensor
is shown . But when I tried to capture video in OpenCv it doesn't seem
to work. For testing whether OpenCv is working properly I used one
sample c++ file kinect_maps.cpp from the following link

http://fossies.org/dox/OpenCV-2.3.1a/kinect__maps_8cpp.html

and I was told that if OpenCV is properly configured with
OpenNI it I should be able get image depth and other information. But
it only shows the following :


This program demonstrates usage of Kinect sensor.
The user gets some of the supported output images.

All supported output map types:
1.) Data given from depth generator
OPENNI_DEPTH_MAP - depth values in mm (CV_16UC1)
OPENNI_POINT_CLOUD_MAP - XYZ in meters (CV_32FC3)
OPENNI_DISPARITY_MAP - disparity in pixels (CV_8UC1)
OPENNI_DISPARITY_MAP_32F - disparity in pixels (CV_32FC1)
OPENNI_VALID_DEPTH_MASK - mask of valid pixels (not ocluded,
not shaded etc.) (CV_8UC1)
2.) Data given from RGB image generator
OPENNI_BGR_IMAGE - color image (CV_8UC3)
OPENNI_GRAY_IMAGE - gray image (CV_8UC1)

Kinect opening ...
done.
Can not open a capture object.
Press any key to continue . . .


This was supposed to show when video can't be captured from the
Kinect. My concern is if OpenCv was not properly configured with
OpenNI commands like "CV_CAP_OPENNI_DEPTH_GENERATOR_BASELINE"
shouldn't work, right?

OpenNI seems to working okay as the Demo applications like
SimpleViewer.net and UserTracker.net are working.
What can be the problem?
Thanks for the attention.

[nathanlin]

I am facing the same problem. Although I tried changing the Openni support option to ON and cmake .. in build, my OpenNi and Prime modules are still off. How to I specify the path? Do I replace ON with the new path (home/kinect/.....)?

On Wednesday, January 18, 2012 1:50:02 PM UTC-8, roberto wrote:

If cmake can not find OPENNI, then you can type the path manually for each variable in cmake regarding to OPENNI.
Cheers.

On Wed, Jan 18, 2012 at 7:39 PM, Gabriele <gabriele.fontanarosa@gmail.com> wrote:

Take a look here:
http://opencv.itseez.com/doc/user_guide/ug_highgui.html

;)

On 18 Gen, 18:54, Faisal Mazhar <faisalmodes...@gmail.com> wrote:
> I want to use OPENCV for Kinect. But I don't have any idea how to do
> that. I heard that it's possible if I configure OpenCV with OPENNI.
> But before that I have to configure CMAKE so that it enables OPENNI.
> How to enable OPENNI in CMAKE so that I can configure OPENCV with
> OPENNI ?

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[David da Silva Pires]

Hi, nathanlin.

No, you can't change the value of the variable WITH_OPENNI to a path, it only accepts boolean values, like "ON/OFF", "TRUE/FALSE" or "1/0" depending of cmake version and graphical interface, I think. I recommend the program cmake-gui, on package cmake-qt-gui, to deal with CMakeLists.txt.

The only thing you can do is set the variable WITH_OPENNI to ON. The, cmake will search for an OpenNI installation on your system. To see where cmake will search, take a look at the file <OpenCV_src_root>/cmake/OpenCVFindOpenNI.cmake, where OpenCV_src_root is the name of the folder where you decompressed OpenCV source code. If you are working on GNU/Linux, it seems that cmake will search for file XnCppWrapper.h on directories /usr/include/ni and /usr/include/openni. It will also search for the libraries libOpenNI.so and libXnCore.so on /usr/lib. Check if you have these files installed on these proper locations. If not, maybe your installation was not successfully completed.

Good luck.

[Erwin José Lopez Pulgarin]

Hi

Maybe this can help, the instructions are very clear:
http://docs.opencv.org/doc/user_guide/ug_highgui.html

If you installation isn't in the default path, you can specify the paths.

[nathanlin]

[nathanlin]

I was able to turn on Openni and Nite modules using cmake gui, but when I run openni_capture or kinect_map, I still receive the error of "Can not open a capture object.", as shown below. What should I do?

Thanks,
Nathan

This program demonstrates usage of Kinect sensor.
The user gets some of the supported output images.

All supported output map types:
1.) Data given from depth generator
   OPENNI_DEPTH_MAP            - depth values in mm (CV_16UC1)
   OPENNI_POINT_CLOUD_MAP      - XYZ in meters (CV_32FC3)
   OPENNI_DISPARITY_MAP        - disparity in pixels (CV_8UC1)
   OPENNI_DISPARITY_MAP_32F    - disparity in pixels (CV_32FC1)
   OPENNI_VALID_DEPTH_MASK     - mask of valid pixels (not ocluded, not shaded etc.) (CV_8UC1)
2.) Data given from RGB image generator
   OPENNI_BGR_IMAGE            - color image (CV_8UC3)
   OPENNI_GRAY_IMAGE           - gray image (CV_8UC1)

Kinect opening ...
done.
Can not open a capture object.

[David da Silva Pires]

Hi, nathalin.

Maybe this problem is caused by a kernel module that is loaded when you connect your Kinect to the USB port. On my system, as soon as I plug my Kinect, it is loaded a module called gspca_kinect. You can see if this also happens to you with the command "lsmod | grep gspca". Then, to remove this module, I do:

     $> sudo rmmod gspca_kinect

and everything works.

If I try to execute kinect_maps from OpenCV-2.3.1 without removing the cited module, I have the same output than you, but with one line added:

=========================================================
(...)

2.) Data given from RGB image generator
   OPENNI_BGR_IMAGE            - color image (CV_8UC3)
   OPENNI_GRAY_IMAGE           - gray image (CV_8UC1)

Device opening ...
CvCapture_OpenNI::CvCapture_OpenNI : Failed to create production tree: Failed to set USB interface!

done.
Can not open a capture object.

=========================================================

I hope this solution works for you too.

Good luck!

[Muhammad Asad]

Hi faisal,

Check out the detailed tutorial on how to configure OpenCV for Kinect using OpenNI at:
Compiling opencv with OpenNI

I wrote this tutorial a while ago when I faced the same problem as you are having.

I hope this helps

[Pedro Silva]

Hi, 

Take a look at www.viim.pt

It uses opencv and you have a package  with opencv for full installation. 

Regards,
Pedro Silva

R&D Manager

+351 91 932 72 38

www.covii.pt

CoVii - Computer Vision Interaction

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