The SDK uses a number of environment variables.

EVOENG_DATA_DIR

This variable is set to 'Data' directory path in the installed SDK.

Windows Platform

SDK package installer will set this variable automatically.

Linux Platform

If required, users themselves must set.

Note

The data direcoty path must include characters in only ASCII code. Or, it could not be found by engine.

EVOENG_PUBLIC_DIR

This variable set public directory to store data generated by the engine at runtime.

Windows Platform

The variable is ineffective and instead value of 'ProgramData' environment variable is always used as the public directory.

Linux Platform

By default, value of 'HOME' environment variable is used as the public directory. If both of 'EVOENG_PUBLIC_DIR' and 'HOME' are not set, error will occur.

Note

On Linux platform, the public directory must have permission for the engine to create/read/write files under it.

EVOENG_OCL_DEV

If the system supports OpenCL technology, this variable configures its devices to be used for many kinds of heavy operations.
If not set, the value ':GPU:' is used by default.

Note

If the variable 'OPENCV_OPENCL_DEVICE' is set, This has no effect.