Compute OpenCV functions server side on image sent from Android

--EDIT--

I wasn't very well understood with the initial question, so allow me to rephrase.

I am working in an image processing application for Android.

Let's admit I will send an image from android to some server.

What I want to know is how to process this image with opencv (c/c++) on the server and return the results to mobile.

Look into setting up a web service if you're just trying to offload the processing to a server and send back some processed data. There's a ton of examples and sample setups based on the server environment (OS, speed, bandwidth needs, etc) out there that should help you get started. You would then setup the OpenCV environment on the server, and perform all of your processing through those libraries. We would need more information on what type of image processing you hope to accomplish to help you more, but again there are lots of examples for OpenCV and great documentation as well. The Android side will depend on how you setup the web service, so based on that choice there are different solutions available for easily interfacing with your server.