Cannot start the RGB frame of StereoS camera by OpenNI2

Technical Support & Q&A
1

Dear All

I am using the StereoS camera by OpenNI2.

Although I can start and read the Depth frame of StereoS by OpenNI2, I cannot start and read the RGB frame of StereoS by OpenNI2.

Astra:

Astra.jpg1284×963 203 KB

StereoS error:

StereoS_RGB_Error_by_OpenNI2.jpg805×89 18.9 KB

Using the same program, the Astra camera can work well, as shown in the 1st image.
About the error of StereoS, please see the second image.

I am looking forward to the help of it.

Thanks.

2

Hi，Wangyuqing,

You could use the “UVCDemo” to read the RGB images in “OpenNI SDK” download from Orbbec website.
Hope it can help you.

Wan

3

While building preview.cpp in “UVCDemo” on Ubuntu 18.04, I receive the following error. What am I doing wrong?

Linux$ make
g++ -g -Wl,-rpath . -o preview preview.cpp -lopencv_core -lopencv_highgui -lopencv_imgproc -I Include -L. -lOpenNI2
/usr/bin/ld: /tmp/ccfcAF1L.o: undefined reference to symbol ‘_ZN2cv7imwriteERKNS_6StringERKNS_11_InputArrayERKSt6vectorIiSaIiEE’
//usr/lib/x86_64-linux-gnu/libopencv_imgcodecs.so.3.2: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Makefile:4: recipe for target ‘preview’ failed
make: *** [preview] Error 1

4

I solved it by adding pkg-config opencv --cflags --libs -lopencv_imgproc to compile statement in makefile.

Now running ./preview shows depth stream and RGB from build-in webcam. It doesn’t show RGB from ORBBEC Astra.

How to get RGB stream from ORBBEC Astra?