Many computer peripherals and add-ons are either pointer or video devices. There are two programs that are very useful when trying to test these devices. The first is the GNU Image Manipulation Program or gimp (www.gimp.org), a very powerful drawing tool that supports most types of pointer devices and can also capture input from video devices such as cameras, scanners, and TV cards.
The second useful program is called Scanner Access Now Easy or sane (www.sane-project.org). This is strictly used for capturing images from a video device such as a scanner, digital still camera, digital video camera, or TV card. The xsane program provides an X-Windows front end for sane. As with gimp, xsane can capture images from a variety of input devices.
The sane, xsane, and gimp programs are installed by the default Ubuntu desktop configuration.
Source of Information : Wiley Ubuntu Powerful Hacks And Customizations
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