BMW G12 Product Information page 14

G12￿Driver￿Assistance￿Systems
3.￿KAFAS
3.3.￿Road￿sign￿recognition
The￿KAFAS￿stereo￿camera￿is￿also￿responsible￿for￿detecting￿top￿speed￿limitation￿road￿signs.
The￿detection￿of￿no￿overtaking/overtaking￿permitted￿signs￿or￿markings￿is￿also￿implemented￿in
the￿G12.
3.4.￿Lane￿detection
The￿KAFAS￿stereo￿camera￿installed￿in￿the￿mirror￿base￿of￿the￿interior￿mirror￿on￿the￿windshield￿monitors
the￿area￿in￿front￿of￿the￿vehicle.
KAFAS￿stereo￿camera
Index
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2
3
The￿KAFAS￿stereo￿camera￿records￿the￿roadway￿up￿to￿approximately￿40 m￿ahead￿of￿the￿vehicle￿and
up￿to￿approximately￿5 m￿to￿the￿right￿and￿left￿of￿the￿vehicle.￿The￿image￿data￿is￿then￿evaluated￿by￿the
KAFAS￿control￿unit￿integrated￿in￿the￿KAFAS￿stereo￿camera.￿Using￿image￿processing,￿the￿control￿unit
searches￿the￿images￿recorded￿by￿the￿KAFAS￿stereo￿camera￿for￿lane￿and￿road￿markings.
The￿appearance￿of￿the￿road￿markings￿can￿vary￿considerably￿in￿the￿image￿depending￿on￿the￿country,
type￿of￿road￿or￿the￿current￿ambient￿conditions.￿The￿system￿can￿detect￿a￿wide￿range￿of￿road￿markings
and￿types￿of￿markings.￿For￿a￿lane￿marking￿to￿be￿evaluated,￿the￿KAFAS￿stereo￿camera￿and￿the￿KAFAS
control￿unit￿must￿first￿be￿able￿to￿clearly￿identify￿it.￿A￿lane￿must￿also￿have￿an￿average￿width￿greater￿than
2.5 m￿for￿it￿to￿be￿evaluated.
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Explanation
KAFAS￿stereo￿camera
Rain‐light‐solar-condensation￿sensor
Photosensor￿for￿electrochromic￿interior￿mirror