A first start (feel free to incorporate in your PR):

>OpenCV is an open-source computer vision library with a separate image-processing module, free for use under the BSD-license. It is developed in C/C++ and the project's aim is to provide implementations for real-time applications, which makes OpenCV a library with comparatively high barrier of entry for code study and modification. The library provides interfaces for several high-level programming languages, including Python through the NumPy-array data-type for images. The Python interface is essentially a one-to-one copy of the underlying C/C++ API, and thus image processing pipelines have to follow an imperative programming style. As opposed to scikit-image, which provides a Pythonic interface with the option to follow an imperative or functional approach. Beyond that, OpenCV's image processing module is traditionally limited to 2-dimensional imagery.