The next step consists of working with stereo cameras. One option is to run two monocular camera nodes, but in general, it is better to consider the whole stereo pair as a single sensor because the images must be synchronized. In ROS, there is no driver for FireWire stereo cameras, but we can use an extension to stereo using the following command line:
$ git clone git://github.com/srv/camera1394stereo.git
However, FireWire stereo pairs are quite expensive. For this reason, we provide a stereo camera driver for USB cameras. We use the Logitech C120 USB webcam, which is very cheap. It is also noisy, but we will see that we can do great things with it after calibration. It is important that in the stereo pair, the cameras ...
