D OPENCV_ENABLE_NONFREE=ON -D WITH_JPEG=ON -D WITH_PNG=ON -D ... EXAMPLES=OFF -D BUILD_ANDROID_EXAMPLES=OFF -D BUILD_DOCS=OFF -D BUILD_ITT=OFF -D INSTALL_PYTHON_EXAMPLES=OFF -D INSTALL_C_EXAMPLES=OFF ...

So, all the new modules should be developed separately, and published in the opencv_contrib repository at first. Later, when the module matures and gains popularity, it is moved to the central OpenCV ...