Opencv on i.MX8 Yocto

[xu_ji1]

Hello,

About i.MX8 Yocto,does the Opencv in aarch64-mx8-poky-linux will upgrade?

Now we use i.MX8 QM 2.3.0 Yocto release the OpenCV version is 4.0.1,we want OpenCV version 4.1.2

does it will upgrade or how to get new OpenCV version?

Thanks

[Bio_TICFSL]

Hello Xu,

in the MX8QM we have the OpenCV 3.4, you have to wait until next releases for version 4.x, currently we are in L5.4.3 BSP, se next releases will appear in July 2020.

Regards

[xu_ji1]

Hi,

You say OpenCV 3.4 is in 4.0.1.imx folder?How to check the correct OpenCV version in Yocto?

Thanks

[Bio_TICFSL]

Hi,

The OpenCV version is contained within a special

cv2.__version__

  variable, which you can access like this:

Checking your OpenCV version using Python

$ python

>>> import cv2

>>> cv2.__version__

'3.0.0'

The

cv2.__version__

  variable is simply a string which you can split into the major and minor versions:

Checking your OpenCV version using Python

>>> (major, minor, _) = cv2.__version__.split(".")

>>> major

'3'

>>> minor

'0'

Regards

[xu_ji1]

hi，

When I input >>> import cv2 on board

it is show that error:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named cv2

pls help check it

Thanks

[don_gunn · Accepted solution]

Hi Xu Ji,

Using the Yocto 5.4.3 release, Python 3 works for this. From the command line on your board:

root@imx8qmmek:~# python3

>>>import cv2

>>> cv2.__version__
'4.2.0'

Don

[xu_ji1]

Hi Don，

Thanks， and do u know how to upgrade Yocto 2.3.0 release OpenCV verison to 4.2.0 that Yocto 5.4.3 release?

[don_gunn]

Hi Xu Ji,

I don’t see a Yocto 2.3.0 release. The earliest Yocto release that I can see support for the MX8 QM in is 4.9.51. You might want to double check the version that you are on.

When you run “bitbake ” you will see the “DISTRO_VERSION” listed. The best way to get a newer version of OpenCV would be to use a new distro.

You can check the version that is provided in your BSP by running:

$ bitbake -s | grep opencv

opencv :4.2.0.imx-r0

In Distro 4.19-warrior you get OpenCV 4.0.1. It might be possible to integrate 4.2.0 into an older distro but it would probably be a fair bit of work.

Best recommendation is to move to Yocto distro 5.4-zeus to get OpenCV 4.2.0

Don

Don Gunn BEng, Bsc

Advanced Engineer, Processor Specialist

Future Intelligent Solutions

C: 604-318-1319

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[xu_ji1]

Hi，

May I use the Python check OpenCV version on the 8QM mek HW board?