Integration of Java,C++,C# in Unity

Hello,

I am planning to use Unity for a project. To do so, i would need to use opencv for android, which might be implemented via either Java(preferably, in Android Studio) or C++. The data i collect from the camera of the phone with opencv has to be transferred to C# or vice versa. I must know that whether such an implementation could be done in Unity. I may elaborate the issue, if needed. I am also open for suggestions indicating this kind of approach would be suitable in Unity, considering that i might use Unity like AutoCAD, by adding some image processing coding.

Appreciated!