Using G API with PlaidML backend

Building with PlaidML support

• Follow instruction to build PlaidML2: https://plaidml.github.io/plaidml/docs/building

bazelisk build //plaidml2:wheel
pip install -U bazel-bin/plaidml2/wheel.pkg/tmp/dist/*

• Setup PLAIDML_DEVICE

python3 /path-to-plaidml/plaidml/plaidml2/plaidml_setup.py
export `cat ~/.plaidml2`

• Build G-API with PlaidML2 support:

cmake /path-to-opencv -DPlaidML2_DIR=path-to-miniconda3/share/plaidml2 -DWITH_PLAIDML=ON

• Run tests:

/path-to-opencv-build/bin/opencv_test_gapi --gtest_filter=*GAPI_PlaidML_Pipelines*