Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Constantin Haas

Christian Schneider

Sebastian Soehner

Tim Kunz

Sascha Saralajew

A method for ascertaining a distance between a vehicle and a projection surface, onto which a characteristic light pattern is projected using a headlight of the vehicle, includes detecting, in an image of the characteristic light pattern captured by an image capturing unit, a characteristic structure produced by a first light-producing unit by evaluating a geometric location relationship in the captured image between the trajectory and characteristic structures of a characteristic light pattern that are located in an environment along the trajectory; calculating a point on the ray path that is correlated with a position of the detected characteristic structure on the trajectory in accordance with the transformation rule; and calculating the distance between the vehicle and the projection surface from the calculated point on the ray path.

Method for distance measurement using trajectory-based triangulation

A method for calibrating an electromagnetic radiation-emitting device configured to emit electromagnetic radiation using a sensor configured to detect electromagnetic radiation emitted by the electromagnetic radiation-emitting device includes projecting a pattern onto a projection surface by way of the emitted electromagnetic radiation, acquiring an image of the projection of the pattern using the sensor, and calculating at least one trajectory in an image plane of the sensor that describes a propagation of the emitted electromagnetic radiation based on a position of a characteristic feature of the pattern in the image and on a further item of information. The method further includes calculating a specific feature along an associated trajectory and calculating an incorrect position of the device by evaluating a geometric correspondence relationship between points in a world coordinate system and their image points in the image plane of the sensor.

Method for calibrating an electromagnetic radiation-emitting device using a sensor unit

A method for determining a location relationship between a camera and a headlight of a vehicle includes positioning the vehicle at a distance in front of a surface exhibiting a calibration pattern, ascertaining the distance between the calibration pattern and the vehicle, projecting a pattern onto the surface using a headlight of the vehicle, and detecting characteristic features in the projected pattern. The method further includes performing the previous steps for at least one additional distance between the vehicle and the surface. In addition, the method includes interpolating positions of detected characteristic features that correspond in each case to one another at the different distances using a linear function, determining an intersection of the ascertained linear functions, and determining the location relationship between the camera and the headlight of the vehicle on the basis of the position of the intersection of the ascertained linear functions relative to the camera.

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Pulheim, Germany

Constantin Haas