Connecting to the Wolfram Engine from C++ using WSTP/LLU - Image and Numerical arrays as parameters

Questions
,
1

The intend of my application is to collect data from a Pylon Camera. Send the image to a running Wolfram Engine. Let some vision algorithm loos on the picture and display the changed picture in a window.

I use the Library Link Utilitues for WSTP communication. The part where I have problems looks as follows:

				try
				{
					LLU::Image<uint8_t> image(100, 100, 1, colorspace_t::MImage_CS_Gray,false);
					/*
						Copy the data from the camera in the image object
					*/
					test << LLU::WS::Function("test =  Image[]", 1) << image;
				}
				catch (LLU::LibraryLinkError e)
				{
					std::cout << e.message() << std::endl;
				}
		
When I execute this peace of code it gives the following error message:

WolframLibraryData is not set. Make sure to call
LibraryData::setLibraryData in WolframLibrary_initialize.

Normally LLU is used the other way around (calling c++ code from Wolfram).
So my question is, is it possible to use the LLU::Image<uint8_t> class in a stand alone application? When Yes, where should I call setLibraryData (Since this is normally done by the Wolfram Engine I believe). By the way, I’ve got the same results when using an NumericalArray.