OpenCV won't do the recognition/task for you, which is what the OP was referring to. In a nutshell, it's a bunch of useful tools/building-blocks. It's up to you

OpenCV won't do the recognition/task for you, which is what the OP was referring to. In a nutshell, it's a bunch of useful tools/building-blocks. It's up to you to use them in the right way, and then apply CV algorithms + training so that it can do something.