topic Re: iMX8 qt cross compile use neon in i.MX Processors

iMX8 qt cross compile use neon

alonghong — Sun, 21 Aug 2022 11:00:58 GMT

Dear Sir

Now, I use iMX8 EVK and use bitbake fsl-image-qt5-validation-imx and bitbake fsl-image-qt5-validation-imx -c populate_sdk.

This is success to compile qt project and run in iMX8. But I use memcpy 1280*800*2 data to OpenCV Mat,

the memcpy needs to spend about 28mS, I find iMX is support neon function.

Neon can improve the speed, but I don't know how to use neon in the cross compile

Please kindly help me.

Thanks a lot.

Best regards.

Zhiming_Liu — Wed, 24 Aug 2022 04:25:58 GMT

The speed will not be improved if you use memcpy after opening the neon.

Recommand you use OpenCL with OpenCV.

alonghong — Wed, 24 Aug 2022 09:53:50 GMT

Hi Sir

How can I to use OpenCL with OpenCV?