OpenCV with OpenCL

OpenCL Enable
- Windows GPU Driver 自带 OpenCL Runtime, 不需要再安装依赖
- Linux 需要下载安装 OpenCL 依赖才能使用 OpenCL
OpenCV OpenCL 环境变量 OPENCV_OPENCL_DEVICE
- 关闭 OpenCL 调用: export OPENCV_OPENCL_DEVICE=disabled
- 使用 Intel iGPU: export OPENCV_OPENCL_DEVICE=Intel:GPU
- Format: <Platform>:<CPU|GPU|ACCELERATOR|nothing=GPU/CPU>:<DeviceName or ID>
- OneAPI Compiler 部分可以将 CPU 视为 OpenCL Device, 否则默认只有 GPU export OPENCV_OPENCL_DEVICE=Intel:CPU
查看使用的 OpenCL Device
- opencv_version --opencl

Reference