How to build a Robot vision system

Hello everybody, hope i can have an advice. So as my final project at university, I have to make a robot vision to find the location of subject that robot can grip. But i don’t have camera kit for robot, and just have module camera, arduino or PLC. There are any way to make it be real. I work with UR3 robot.
Thanks you very much.

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May I suggest investigating OpenMV.
Lots of great built-in vision functions and algorithms and a python interface.