| The orientation angles of the lane departure warning camera cannot be determined directly. They are calculated using a calibration board. The calibration board consists of geometric elements which contrast distinctly with the rest of the board. |
| The board is aligned in a reference position in front of the vehicle. The camera then records images of the calibration board. The position of the geometric elements on the image is determined by analysing the picture. A software routine uses the image co-ordinates and the known reference position of the board to determine the camera's actual orientation angles, and stores this information in the control unit. The actual height of the camera on the vehicle is also determined. |
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