Instead of using the Raspberry Pi Camera Module, it's also possible to use a standard USB webcam to take still images. You should be aware though that the dedicated camera module is far superior to a USB webcam in terms of image quality. Although, you may already have a webcam knocking about in your box of bits, so why not try it?
After you've connected your webcam to a USB port on your Pi, you can check whether it's been recognized using the
I'm using a Logitech webcam that gets reported as follows with
lsusb (Device 006):
pi@raspberrypi ~ $ lsusb Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device ...