szangvil:
I am no expert at this, but the company I work for was using image processing hardware in their machines over 20 years ago(!). Isn't the Arduino (or a few of them connected together) "strong" enough to do what was done by hardware 20 years ago?
I did image processing 30 years ago on a TRS80 computer.
While the processing power was roughly the same as an arduino the memory capacity was not. That is what stops you using the Arduino to do any meaningful image processing. Also I build my own real time frame grabber. I programmed it in Fourth.