How to Zoom in and out in Live Video Stream on user input using embedded coder support package

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Sanju Bera 2018-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/390351-how-to-zoom-in-and-out-in-live-video-stream-on-user-input-using-embedded-coder-support-package

I am using embedded coder support package to program beaglebone black using simulink. How do I perform zoom in and out operation on the live video stream based on the user input. I want to perform similar zooming operation just like we can do in with any kind of smartphones or mobile phones.