Method for determining an illumination range of at least one headlight and method for calibrating a light emission of at least one headlight of a vehicle
AssigneeRobert Bosch GmbH
InventorJohannes Foltin
Life of this patent
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Abstract
A method for determining an illumination range of at least one headlight of a vehicle includes a step of detecting at least one road-marking feature, which is illuminated by the at least one headlight, a step of ascertaining a distance between the vehicle and the at least one illuminated road-marking feature, and a step of determining the illumination range of the at least one headlight, using the ascertained distance.
Claims16
A method for determining an illumination range of at least one headlight of a vehicle, the method comprising:
- detecting a reflection of light from at least one road-marking feature, which is illuminated by the at least one headlight;
- making a threshold value decision, in order to check if a brightness value of the reflection is above or below a specifiable brightness threshold value;
- ascertaining a distance between the vehicle and the at least one illuminated road-marking feature as a function of the threshold value decision;
- and
- determining the illumination range of the at least one headlight, using the ascertained distance.
A method for calibrating a light emission of at least one headlight of a vehicle, the method comprising:
- determining an illumination range of the at least one headlight by detecting a reflection of light from at least one road-marking feature, which is illuminated by the at least one headlight;
- making a threshold value decision, in order to check if a brightness value of the reflection is above or below a specifiable brightness threshold value;
- ascertaining a distance between the vehicle and the at least one illuminated road-marking feature as a function of the threshold value decision, and determining the illumination range of the at least one headlight, using the ascertained distance;
- and
- combining the determined illumination range and a predefined illumination range, in order to generate a calibration value;
- and outputting a calibration signal representing the calibration value, in order to calibrate the light emission of the at least one headlight.
An apparatus for determining an illumination range of at least one headlight of a vehicle, comprising:
- an image pick-up unit;
- and
- an illumination-range measuring device;
- wherein the image pick-up unit detects and generates an image of a reflection of light from at least one road-marking feature, which is illuminated by the at least one headlight, and the illumination-range measuring device determines the illumination range of the at least one headlight by making a threshold value decision, in order to check if a brightness value of the reflection is above or below a specifiable brightness threshold value;
- ascertaining a distance between the vehicle and the at least one illuminated road-marking feature as a function of the threshold value decision, and determining the illumination range of the at least one headlight, using the ascertained distance.
A non-transitory computer-readable medium having a computer program, which is executable by a processor, comprising:
- a program code arrangement having program code for determining an illumination range of at least one headlight of a vehicle, by performing the following:
- detecting a reflection of light from at least one road-marking feature, which is illuminated by the at least one headlight;
- making a threshold value decision, in order to check if a brightness value of the reflection is above or below a specifiable brightness threshold value;
- ascertaining a distance between the vehicle and the at least one illuminated road-marking feature as a function of the threshold value decision;
- and
- determining the illumination range of the at least one headlight, using the ascertained distance.
Dependencies are inferred from the claim text.