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Backup camera ( reverse, forward, side view )
A backup camera is a special type of video camera that is produced specifically for the purpose of being attached
to the rear of a vehicle to aid in backing up. Backup cameras are alternatively known as 'reversing cameras' or 'rear
view cameras'.
The design of a backup camera is distinct from other cameras in that the image is horizontally flipped so that the output is a mirror image. This is necessary because the camera and the driver face opposite directions, and
without it, the camera's right would be on the driver's left and vice versa. A mirrored image makes the orientation of
the display consistent with the physical mirrors installed on the vehicle. A backup camera typically sports a wide-
angle or fisheye lens. While such a lens spoils the camera's ability to see faraway objects, it allows the camera to
see an uninterrupted horizontal path from one rear corner to the other. The camera is typically pointed on a downward
angle, to view potential obstacles on the ground as well as the position of approaching walls and docks, rather than
straight back.
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