OpenCVSharp missing dll

Hey,
I am trying to use OpenCVSharp to do face tracking and download the Dll from here : OpenCvSharp.

Everything is good in editor, but I have two question here:

  1. In editor mode, It always show up the debug message
    “DllNotFoundException” when I press the play button at first time, but it will fine at second time…why?

  2. when I build the exe file, Development Build Message still told me “DllNotFoundException”. I’m sure all Dll is put in “Assets/Plugins” and change player setting “.Net 2.0 subset” to “.Net 2.0” ,but it still can’t work.

Could someone help me?

Here can download my project → Here

I found that I needed to add the dlls to the system path to get it to work. Having them within the project didnt seem to work so I moved all of the opencv dlls (opencvcore_248, etc) to c:\OpenCV\Unity and then added that to the system path.

Doesnt really sort how to release it though.