Need guidance on building a new robot

Hello everybody!
I am new to arduino. I am building a robot and here are complete details of my project.
I am building a robot in which I am using image processing. Robot's navigation will be on image processing. So far I have decided to controll motors through my mini netbook because I can place this on my robot.
So my question is that can arduino controll 48 V motors. Because I am using 6 motors which require 48V. And my next question is that how I can interlink image processing through matlab or open cv to arduino.
If further information is required then ask me.
All comments are welcome!
Thanks!

So my question is that can arduino controll 48 V motors.

With the appropriate motor driver shield, yes. Note that such a shield is NOT going to be cheap.

And my next question is that how I can interlink image processing through matlab or open cv to arduino.

Have you even tried running Open CV? If not, I suggest that that is your next step. When you do, you'll see that one of the things that you can configure is the serial port that it talks to.