How to read text from a surface in real time from device cam

Question

I was working on a project in unity to read text that is engraved on metal surface.I checked many forums and websites.I usually end up in python related codes.I do not know python and C++.I am looking for a solution using Unity with C#.I have read about OPEN CV, the asset store plugin costs about 95$ a bit costly . I am not sure whether it will solve my case.I downloaded the trial package of OPEN CV for unity. In that , an example scene is there where we can already read text from a preset image but I want to read text in real time using device camera(IOS/Android).Any options to do this project in unity itself.An example scene or tutorial would be helpful. 

https://i.stack.imgur.com/XZeGS.jpg