Image Manipulation Library / API for Modifying Faces

I'm looking for an image manipulation library, preferably in .NET, that makes it easy to recognize and manipulate 开发者_如何学Pythonfaces in images. Is there a library out there that does this?

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There is OpenCV (Open Source Computer Vision), which is a is a library of programming functions for real time computer vision.

I'm not familiar with it, so I don't know if it will make "easy to recognize and manipulate faces in images", but you can give it a look. It's not in .Net, but you tagged your question with C++ and Python, and it works with those.