eIQ sample application error in 4.19.35_1.1.0

[massimomartelli]

Hello,

I have the following error when using the examples from the SDK binaries and the i.mx8MQ EVK:

root@imx8mqevk:/usr/share/OpenCV/samples/bin# ./example_dnn_object_detection -width=1024 -height=1024 -scale=0.00392 -input=dog416.png -rgb -zoo=models.yml yolo
terminate called after throwing an instance of 'cv::Exception'
what(): OpenCV(4.0.1) /usr/src/debug/opencv/4.0.1.imx-r0/git/modules/highgui/src/window.cpp:610: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvNamedWindow'

Aborted

I flashed the full image "imx-image-full-imx8mqevk.sdcard".

It's a build error, I believe the sample was built without windowing system support.  Am I right?
See:

https://source.codeaurora.org/external/imx/opencv-imx/tree/modules/highgui/src/window.cpp?h=4.0.1_im...   @line 610 we are really falling in the “#else // No windowing system present at compile time ;-(

How shall I fix it?

Thanks, best regards

Massimo

[vanessa_maegima]

Hi massimomartelli‌,

It's a build error, I believe the sample was built without windowing system support.  Am I right?

I guess that's indeed the issue. Can I suggest you to rebuild your image with OpenCV Qt support?

Add to local.conf:

PACKAGECONFIG_append_pn-opencv_mx8 = " dnn python2 qt5 jasper openmp test neon"

Let me know how this works.

Vanessa

[MengJu_Lin]

vanessamaegima‌

I have a similar issue when running the demo on i.MX8M Mini EVK with L4.19.35_1.1.0.

Below is the error message when I run "Image classification" demo.

"root@imx8mmevk:/usr/share/OpenCV/samples/bin# ./example_dnn_classification --input=dog416.png --zoo=models.yml squeezenet
terminate called after throwing a[ 125.249087] audit: type=1701 audit(1584460803.812:3): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=4031 comm="example_dnn_cla" exe="/usr/share/OpenCV/samples/bin/example_dnn_classification" sig=6 res=1
n instance of 'cv::Exception'
what(): OpenCV(4.0.1) /usr/src/debug/opencv/4.0.1.imx-r0/git/modules/highgui/src/window.cpp:610: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvNamedWindow'

Aborted
root@imx8mmevk:/usr/share/OpenCV/samples/bin#

"

I did modify local.conf

PACKAGECONFIG_append_pn-opencv_mx8 = " dnn python3 qt5 jasper test"

Do I miss anything?

[vanessa_maegima]

Hi Meng,

Could you please share the complete local.conf file?

Thanks,
Vanessa

[MengJu_Lin]

The attached file is my local.conf

[vanessa_maegima]

Hi Meng,

Could you please replace the opencv append line with this one and rebuild your image?

PACKAGECONFIG_append_pn-opencv_mx8 = " gtk jasper test"

To clean the opencv package and rebuild the image:

bitbake -c cleanall opencv

bitbake imx-image-full

It seems like Qt5 windowing system was not enabled correctly so let's try GTK.

Let me know how it goes.

Thanks,
Vanessa

[MengJu_Lin]

vanessamaegima‌

it is working using GTK instead.

Thank you so much!

[vanessa_maegima]

Hi Meng,

Great to hear that GTK works. Thanks for letting me know.

[massimomartelli]

I will do it in the next couple of days. 

Can you please confirm if this is the expected behavior with the NXP prebuilt binaries?

I used imx-image-full-imx8mqevk.sdcard from "L4.19.35_1.1.0_images_MX8MQEVK.zip".

Thanks, best regards

Massimo

[vanessa_maegima]

This is not expected in prebuilt binaries however Qt5 support might be missing in OpenCV in our image. I'll try to check that on my side as well.