how to use OpenCL in OpenCV?

[1019599657]

hi

I am a green hand. i want to use OPENCL with opencv .I know that OpenCV support Intel's GPU default, And how I can use Imx8's GPU with OpenCV? If I need to compile with OpenCV source with OpenCL ? And I look for Information for Internet that when compile OpenCV with openCL, it need some .so ,like:

static const char *default_so_paths[] = {                                             "/system/lib64/libOpenCL.so",                                             "/system/vendor/lib64/libOpenCL.so",                                             "/system/vendor/lib64/egl/libGLES_mali.so"                                          };
However,I find libOpenCl.so and libGELSV1_CM_VIVANTE.so and libGLESv2_VIVANTE.so ,and others like libCLC.so libLLVM_vivo.so
libVSC.so libGAL.so ,whta i can need to used in the code above?

[bernhardfink]

Something to consider: 

• if you write native OpenCL code, then the GPU from the i.MX devices gets involved.
• if you write OpenCV code, then the i.MX BSP uses the ARM NEON accelerators from the Cortex-A cores

This means that OpenCV based jobs may be executed much slower on i.MX, compared to platforms where OpenCV is supported by a GPU core.

Regards,
Bernhard.

[Bio_TICFSL]

Hi Li,

OpenCL and OpenCV are enable and comes by default in your yocto BSP for iMX8

Regards

[joanxie]

you should find libOpenCL.so from <ROOTFS>/usr/lib, for more detailed information, pls refer to the Chapter 5 Graphics of enclosed file