Method for calibrating a common horizon line

A method for calibrating a common horizon line of a plurality of cameras of a motor vehicle which are arranged at different heights, the method comprising the following steps:

• ascertaining a common horizon line for all of the cameras by specifying a common height value for the cameras;
• calculating a respective scaling factor for each camera of the cameras based on the common height value and an actual height of the camera;
• and
• scaling a camera image of each camera with the respective scaling factor, so that a respective horizon line of each camera is mapped to the common height value;
• wherein a value is defined as the common height value which lies between the actual heights of the cameras on the motor vehicle, and a height of a camera of the cameras whose height lies between a maximum and a minimum height is used as the common height value.

A device, comprising:

• at least two cameras which are mounted at different heights ;
• and
• a graphic processing unit configured to process image information of the cameras;
• wherein the device is configured to calibrate a common horizon line of the cameras, the device configured to:
• ascertain a common horizon line for all of the cameras by specifying a common height value for the cameras,
• calculate a respective scaling factor for each camera of the cameras based on the common height value and an actual height of the camera, and scale a camera image of each camera with the respective scaling factor, so that a respective horizon line of each camera is mapped to the common height value,
• wherein a value is defined as the common height value which lies between the actual heights of the cameras on the motor vehicle, and a height of a camera of the cameras whose height lies between a maximum and a minimum height is used as the common height value.