https://github.com/RoyiAvital/FastGuassianBlur

This is just simple thread class – contains virtual void run() function to do some job asynchronously. Has start(); and wait(); methods – one runs thread task and another waits until its finished. So you can use any thread implementation here (c++11 std::thread, boost::thread from boost lib, etc).

I dont know about matlab implementation, but you can probably look into JS version as it expected to have more obvious code (http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html).

Thank You.

Do you have trouble to perform blur fast enough or to get/show image? Blur part speed should depend on device resolution in your case. May be its even good idea to use every second pixel in case of full hd device resolution. For normal case algorithm described here should work under 200ms – how fast are your results? May be slow part is on java side when you provide image data to blur.