I'm very new to FPGA. I got a Spartan-6 from Digilent. As my final year project I want to do image processing through it. How can MATLAB & Simulink be used for this? How should the camera be connected to the board? Through HDMI or USB?
You're very new to FPGAs and you want to do image processing? I'm no expert but that sounds like biting off a lot more than you can chew. Can you answer any of these questions:
What image processing algorithm do you want to implement? Can you express the algorithm in pseudocode?
What format is the image you want to process? Bitmap? JPEG? What color depth?
What image sensor have you chosen? What resolution is it? Is it grayscale or color?
Do you have a basic block diagram of the system? Can you show us?
If you haven't thought about any of these questions or don't understand the terms I'm using then this project probably isn't for you.
If you can get a sensor which directly connects to the FPGA pins (ie a clock, couple of sync pins and some data pins) you'll get going much quicker than having to pull data over USB/Firewire/etc.