How to pass and access a binary image(BW byte array) as parameters to the c++ shared library containing Matlab functions?

I have created a c++ shared library with matlab functions inside, for example:

Matlab function:

function out=mmImresize(Data,ratio) out=imresize(data,ratio); end

c++:

i. e. function:

mmImresize(int nargout, mwArray& output, const mwArray& data, const mwArray& ratio);

How can i pass my BW image to that function, don't know how to convert 2d byte array to mwArray& and vice versa.