Gig-E Vision is a camera bus technology that standardizes the Gigabit Ethernet, adding a ‘plug and play’ behavior (such as device discovery) to the latter. For its relatively high bandwidth, long cable length and diffused usage it is a good solution for industrial applications.

Speed. Gigabit Ethernet has a theoretical maximum bandwidth of 125 MB/s, that goes down to 100 MB/s when considering practical limitations. This bandwidth is comparable to FireWire standard and is second only to Camera Link.

Costs. System cost of GigE vision is moderate; cabling is cheap and it doesn’t require a frame grabber.

Cables. Cabling length is the keystone of GigE standard, going up to 100 m. This is the only digital solution comparable to analog visioning in terms of cable length, and this feature has helped GigE Vision to replace analog e.g. in monitoring applications.

Power over cable. Power over Ethernet (PoE) is often available on GigE cameras. Nevertheless, some Ethernet cards cannot supply enough power, so that powered switch, hub, or a PoE injector must be used.

CPU usage. CPU loads of a GigE system can be different depending on drivers used. Filtered drivers are more generic and easer to create and use, but operate on data packets at high level, affecting the system CPU. Optimized drivers are specifically written for a dedicated network interface card, that working at lower lever affects poorly the system CPU load.

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