Packaging with Third Party DLL

Hello. I’m trying to wrapping up my project with OpenCV dynamic libraries.
The project work in editor correctly and I have packaged the project. It finished smoothly.
However when I launched exe file, the error message showed up. It says just “Fatal Error”.
The project has not launched yet.

Do thirdparty DLLs have to be copied by manually to somewhere?
Does anyone come across with this issue?

I’m using UE4.11 C++project with visualstudio2015,windows7