Estimation of speed of a vehicle based on light intensity measurements
AssigneeHERE Global B.V.
InventorsPavel Ivanov, Henri Jaakko Julius Nurminen, Lauri Aarne Johannes Wirola
Life of this patent
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Abstract
A method is provided that is performed by at least one first apparatus with the method including obtaining or causing obtaining information indicative of a variation in intensity of light emitted from at least two light sources positioned along a segment of a road; and obtaining or causing obtaining information indicative of a velocity of the at least one first apparatus based at least on the information indicative of the variation in intensity. A corresponding apparatus is also provided.
Claims18
A method comprising:
- obtaining light intensity information that is indicative of an intensity of light emitted from at least two light sources positioned along a segment of a road and detected by a light sensor;
- converting the light intensity information into data representative of a variation in the intensity of light;
- detecting light emitted from the at least two light sources while moving along at least part of the segment of the road, wherein the data representative of the variation in the intensity of light comprises a temporal frequency at which the intensity varies at least while moving along the part of the segment;
- obtaining information indicative of a mutual distance between the at least two light sources wherein the mutual distance is based on at least information indicative of a length of the segment of the road;
- and
- obtaining information indicative of a velocity of at least one first apparatus and/or of at least one further entity based at least on the data representative of the variation in the intensity of light.
A method performed by at least one first apparatus, said method comprising:
- obtaining light intensity information that is indicative of an intensity of light emitted from at least two light sources positioned along a segment of a road and detected by a light sensor;
- converting the light intensity information into data representative of a variation in the intensity of light;
- obtaining information indicative of a length of the segment of the road;
- and
- estimating information indicative of a mutual distance between the at least two light sources based on at least the information indicative of the length of the segment of the road.
An apparatus comprising at least one processor and at least one memory that contains program code, wherein the at least one memory and the program code are configured to use the at least one processor to cause the apparatus to perform and/or control at least:
- obtaining light intensity information that is indicative of an intensity of light emitted from at least two light sources positioned along a segment of a road and detected by a light sensor;
- converting the light intensity information into data representative of the variation in the intensity of light;
- detecting light emitted from the at least two light sources while moving along at least part of the segment of the road, wherein the data representative of the variation in the intensity of light comprises a temporal frequency at which the intensity varies at least while moving along the part of the segment;
- obtaining information indicative of a mutual distance between the at least two light sources wherein the mutual distance is based on at least information indicative of a length of the segment of the road;
- and
- obtaining information indicative of a velocity of at least one first apparatus and/or of at least one further entity based at least on the data representative of the variation in the intensity of light.
Dependencies are inferred from the claim text.