I am glad that it helped you. To bypass the computer and implement it on FPGA alone, then you will need to have a data flow or flow chart made by yourself on how to implement it. It means, you have to apply several algorithms for image processing in FPGA using VHDL or Verilog. Also you need to know what kind of Camera will be interfaced to FPGA, using USB or CameraLink interface.
So if you make a plan for this then it will be easy for you to analyse and I am not an expert but a beginner with less experience in this domain.