Human Falling Detection in Video on DE2!! HELP

Hi, I am working on my final year project with DE2 board and Nios II. DE2 connects with the Camera via USB port, and detect human falling - using detect falling in video algorithm written by C language. If the falling situation was detected, the DE2 send a signal to activate a Robot, and navigate Robot to approach the person via Ethernet port (UDP Server/Client Protocol written in C language).

Here are my questions:

1) How to make DE2 recognize my USB camera?

2) To implement C program language on DE2, do I need to implement µClinux on DE2 first? Because I think I am calling the network protocol library in the Linux environment.

Please anyone expert in this, help me out!